saw my sisters pussy

so me and my sister were home alone because my dad and my mom were at work working night shift and i had to watch over her and i couldn’t go outside or anything and it was pretty late anyway so me and my sister just watched tv in the living room while being kinda close but not touching eachother yet and i was just in shorts and she had a top on and just her panties but she had an blanket over her so i couldn’t really see anything then at some point it got pretty late and she fell asleep and i was horny because i didn’t jerk off in a few weeks and i don’t know what i was thinking but i removed the blanket slowly because i know shes a heavy sleeper and i started looking at the outline of her pussy and i got even harder then i pulled her panties to the side and started licking it for a few seconds and then i was scared of her waking up so i stopped pulled the blanket over her and went into my room to jerk off and i came so fast and a lot (she’s asleep right now aswell so give me ideas)