I still wondered if my lil sister actually caught me but by instincts,  I knew she did.

It happened that I was discreetly using dad's  phone again and she entered in on me. I was shocked and asked her what the heck she wanted.

She just smiled and went away.

It was not only limited to dad's phone,  I was addicted that I used any phone I found. I learnt new tricks over the years.

Like clearing My Activity  in google/ chrome and clearing the search history and accounts.