Encouraging Perverted Stepson - you forgot the condom again you little bastard

My stepson with a big erect penis in his pants turned to me for help and i couldn’t refuse him help. but we agreed that he would not tell anyone about my help. since he didn’t have condoms , i had to offer him my ass, it’s tight and no one crawls with it, he can penetrate any of the holes, but to be careful so that i don’t end up pregnant.