Masturbating outside With Sister

Last week my sister Amanda and I decided to do a dare.

Which was both of us to go outside nude and run around naked. This was night time when people were asleep.

Amanda is 12 and who's breasts are 32B, nice ass, and a little chubby. We just decided to masturbate each other while I fingered her while she pumped my cock.

We both came at the same time. She wanted me to come on her breasts. After that we went back inside and went to sleep.