"Der'mo is right."

You slip out of Pietro's arm as your sister walks into the kitchen. She seems unphased by what she's seen, casually strolling up to the refrigerator and retrieving a carton of milk. She then turns to the Stark-sized pantry to get the lone box of her favorite cereal. You wait for her to turn back to you and chastise you and your boyfriend, but what she's doing instead is worse.

She's giving you both the infamous Romanoff silent treatment.

You swallow visibly as Natasha sits down at the counter with her late evening snack of usual breakfast food. Your big sister keeps her eyes glued to you and Pietro, casually shifting between you both like a lioness stalking her prey.

"How long have you known?" you ask softly.

Natasha smirks and takes a bite of her snack. "Long enough."

"Are you mad?" The next question is asked softer.

Natasha's eyes flicker to Pietro, staring at him intently. "I've been watching Maximoff for a while now. I had the others keep an eye on him."

Pietro scowls. "Rude."

You elbow him hard in the ribs, just hard enough to make him shut up.

"And?" you ask, preparing for the inevitable scolding.

Natasha's glare relents. "He seems like he's all right, and if he's the one you want to be with, who am I to stop you, mladshaya sestra?"

"See, that's where you're wrong. Pietro is great, and I'm a grown-ass woman--" You cut yourself off when you realize Natasha's response was one of approval, not the disapproval you expected. "Wait...what?"

Natasha chuckles, stands from her seat with cereal in hand, and walks over to you. She presses a sisterly kiss to your cheek, amused by your shock. "I'm happy you're happy, little sister." She turns to Pietro, her eyes turning to daggers when his meet hers. "You hurt her, no one will find your body."

Natasha leaves the kitchen, and Pietro swoops you up into his arms, spinning you around in joy. "I told you it would be fine!"

He sets you back down, but you're too stunned to do anything other than mumble, "Well, that went better than I thought it would."

Pietro grins down at you. "I think she likes me."

You scoff a laugh, breathing easily for the first time since Natasha saw you together. "What gave it away?"

"Well, I'm not dead, so that's a plus."