Apollo's POV
For a while now I've been noticing that Percy has been acting a bit strange when I'm training him. I had my suspicions about why, but I doubted them. I had sometimes caught him staring at me, and sometimes  also saw him blushing when we talked. He would also sometimes  seem to zone out when I was trying to teach him something.
I had been in enough romantic relationships to recognize when someone has romantic feelings for me, and I thought that might be why Percy was acting weird.  I doubted that theory though because as far as I knew Percy was straight.  As far as I'm aware, he has only ever been with women, and although I'm certainly not aphrodite I thought his sexuality was obvious. Now I was wondering if he might be bisexual and just hadn't come out to many people. I wasn't sure but  maybe I would find out.
I had been spending a lot of time with him since I had been training him ever since he became a god. Due to that I thought I had also developed romantic feelings for him. I certainly found him attractive, I had just never made a move because I thought he was straight. Now his training was coming to an end and I wouldn't see him as much once that was over. Now that I realised he might not be straight I knew that if I was going to make a move I should probably do it soon.
I waited until he came for his next lesson, and once we had finished it Percy didn't leave right away, and I was about to speak when Percy spoke first.
He said, "Apollo there's something I want to tell you,"
He was silent for a few moments perhaps uncertain how to word his next statement. When he finally found the right words he admitted to having feelings for me and he was clearly hoping that I shared his feelings. I could have told him in words, but I decided to answer him in a different way. I leaned forward and kissed him, making it obvious that I have feelings for him as well. The kiss may not have lasted long but I think it was enough for Percy to realise how I felt about him.
We stayed there for a while, talking and kissing some more. I was also slightly concerned, I knew that I had feelings for Percy, but due to all the failed relationships I've had in the past, I usually avoid committed long term relationships and just have one night stands or short relationships that don't last long. I wasn't sure I would be able to commit to one person, but I also didn't want to hurt percy by betraying him like that daughter of Athena did. I guess we would probably just have to talk about it and probably also take things slow. I wasn't sure how everyone else would react to our relationship, only time would reveal how it would turn out and, there was no point in worrying about something that might never even happen.

Percy's point of view
Finally revealing my feelings to Apollo was kind of a relief. the fact that he seemed to share my feelings only made it better. I hoped that this could work out and we could stay together, but I was also slightly concerned about whether either of us were really ready to commit to one Person. I was already well aware of how Apollo usually spends his nights, and I have been doing basically the same thing ever since that first night with Lisa. Hopefully we would work through it and figure it out but for now we were just enjoying the moment we were currently sharing as our lips met once again.
After I left Apollo's palace, I was happy,  I admitted my feelings to him and he returned them. Now I  knew that we could be together, and hopefully our relationship would work out.  After I got back to my own Palace I was surprised by the sound of my cell phone ringing, I suspected who it was, and once I saw the screen I knew I was right. I answered it, "Hey Lisa, how are you doing?"
"Fine,"
"Are you sure?" I asked because she sounded nervous or worried I wasn't sure which, It might have been both. Either way I was concerned that something was wrong.
"Can you come here right now?"
"Yes, what's wrong?"
"There's something I have to tell you,"
"Okay, I'll be there soon, bye,"
"Bye,"
I hung up and then  Headed to Lisa's, concerned about what might be bothering her. I had some ideas  for what that might be but I also could be totally wrong.  I would find out soon regardless. Once I got to Lisa's apartment, she let me in, and it was soon after that when I found out what was bothering her.  I asked "Lisa what's wrong?"
She still seemed nervous, and hesitated at first before answering, ",Percy I'm pregnant,"
"Are you sure,"
It's not that I doubted her, I just wondered if she was completely sure.
Instead of answering she started walking away, toward her bathroom. When she came back she held two pregnancy tests that both showed the same result, she was definitely pregnant. 
To be honest I wasn't too surprised considering the number of times we'd had sex. although we had tried to avoid this happening, clearly we had failed.
l had mixed feelings about becoming a father, and I was kind of worried as well but I tried not to show it as I did my best to reassure her that everything would be okay.
"I will do everything I can to help you," I promised her.
My mind flashed to the fact that she still didn't know that I was actually a Greek god. Now that she was pregnant I knew I should probably tell her the truth. I wasn't sure about that though since  not all mortals can handle knowing that everything from Greek mythology exists and I am one of the gods. I knew I wasn't going to tell her today though since she had enough on her mind without adding all that to the mix. She just learned for sure that she was pregnant. I was going to let her get used to that before saying anything about what I am and what that will mean for our child.

I will continue to visit her to help her, and perhaps eventually I will tell her the truth. I had mixed feelings about becoming a father,  part of me was happy about it but I was also worried.  A lot of questions were going through my head. what would our child look like, would they be a boy or a girl, would they look more like me or Lisa?
I was also kind of hoping that none of the other women I'd had sex with would get pregnant but there isn't anything I could do to prevent it now. If any of them did I knew I would do everything I could to help them.
For now I will do everything I can to help Lisa, and once our child is born I will do everything I can to keep her and our child safe, and so our child will have a decent childhood.
Lisa and I talked for a while about the baby and what we would do now, I did my best to reassure her that everything would be okay. I had told her that she didn't have to go through with the pregnancy if she didn't want to, but she told me that she would have the baby. Of course I was happy about that, although I would have understood if she had chosen not to go through with the pregnancy. 
After we talked for a while, I returned to my palace. I hoped that Lisa was feeling better now that I had done my best to try and reassure her that everything will be alright. I will probably end up telling her the truth about what I am since I felt like she deserved to know it. I was just going to give her some more time until she feels better about all this. I just hope that she can handle it when I do tell her.

I knew that I should probably also eventually tell my parents that I am going to be a father. I wasn't going to do it just yet though.  I  was going to continue to visit Lisa often to help her as much as I can.  My relationship with Lisa is a bit strange. A lot of our previous encounters ended in sex, but not all of them had. We could be in a room together without being all over each other.  I also knew that I didn't have romantic feelings for her. I kind of saw her as a friend despite our many intimate encounters.
For a while my  days were spent  visiting Lisa, going to my training with Apollo which included more than just training now that we knew about our feelings for each other. I also visited the demigod camps. Apollo and I had talked, and for now our relationship would be an open one, so I hadn't stopped seeing other people besides him. I'm sure that he hadn't stopped seeing other people either.
I was okay with it for now. If we eventually decided we only wanted each other we would stop and would just be with each other.  Since I found out about Lisa's pregnancy I was even more careful to avoid getting the women I was with pregnant.  It did occur to me that I might already be too late to avoid that with Olivia. I didn't know if she was pregnant. she hadn't told me she was but it wouldn't surprise me much  if she was.  Regardless I eventually ended up telling Apollo that Lisa was pregnant.
It happened during my final training session with him.
I had kind of zoned out so I wasn't hearing what he was saying as my mind had wandered to Lisa and her pregnancy. It seemed Apollo noticed that I wasn't paying attention.
"Percy!" he practically shouted.
"What? Oh sorry Apollo,"  Isaid as I was snapped out of my reverie.
"It's alright Percy, but is there something bothering you?"
I hesitated, I couldn't lie but I also didn't really want to tell him the truth right now. He would find out at some point,  I knew that, so I decided I should probably tell him now rather than him finding out by accident later on. Besides I doubted it would bother him considering Lisa getting pregnant had happened before he and I revealed our feelings for each other. and even if it hadn't I doubted it would bother him much considering we had an open relationship and it wouldn't really surprise me if he had fathered another child recently.
So I came to the conclusion that my best option was to tell him.
"I'm okay Apollo, but I guess I just have a lot  on my mind right now,"
"Like what, I can probably help you,"
"I don't think you can, this is pretty personal,"
Will you at least tell me what you're worried about?"
"Okay fine, do you remember that night when I went with you and Hermes to that bar in New York?"
"Yes, you left with that mortal and  had sex with her,"
my cheeks coloured slightly after his blunt statement. I replied, "Yeah well I was with her several more times after that, and I recently found out that she's pregnant, I guess I'm just worried about whether I can be a good father.  Especially  since I can't help her as much as I would like despite the fact that I'm not as restricted by the ancient laws as the rest of you are, "
Apollo was silent for a few moments although he didn't seem too surprised by what I'd just told him. I was a bit concerned by how long it was taking him to respond to that. When he finally spoke again he said, "Percy if I know you as well as I think I do that child will be lucky to have you as their father. I'm sure you can be  a good father despite not being able to be there for your child all the time. You shouldn't worry so much. I know you will do everything you can for your child and its mother, so leave the future to the fates and try to stop worrying,"
I nodded although I wasn't sure how reassured I was. Despite that I knew worrying wasn't really accomplishing anything either, I needed to just push my worries aside and try to be the best father I could.

A/N Well, I hope you like this story so far, and the Perpollo has started. I was just wondering, should I make any of the other girls Percy was with get pregnant? there will probably be at least one more that will. I've thought about making the nymph get pregnant I'm just not sure what their child would be.