My friends found this site and said I should put what happened on here

Im 15(f,36c) I don't sleep with a bra on and lately I've been having problems with my button up pj tops as its been unbuttoned and I decided to figure out why, I stayed awake on night faking sleep and in comes my little sister (10) she slips under my covers with me and starts unbutton my top then starts sucking on my nipple then switched to the other one after 5 minutes she leaves and I couldn't help myself and rubbed one out

The next day I told my friend and she said to really catch her to be able to confront her so that night I stayed up again as my sis came in and did it again as she started to suck i wrapped my arms around her and held her as she squirmed I asked her what she was doing she explained the dares her and her friends do and after that first time she like it

So now I let her suck on them before bed sometimes in her room others in mine and after I play with myself