I am 17 now and my mom and dad split up 10 years ago. My dad has had a girlfriend for 9 years and recently i have been masturbating whilst thoinking of her. One day she was getting ready to go to her friends and she said what do i look like and i said very nice. she went upstairs and shortly later i followed and went to ask if she wanted a coffee. When i walked in the room she was standing at the mirror and brushing her hair. She asked me to pass her the straightners so i did and when i was behind her i touched her ass and she jumped. I said only joking and then she leaned forward and kissed me. we were kissing for atleast 15 minutes on the bed then i undid her top and took off her bra and pants and she said are you sure that you want this and i kissed her then we had sex all over the house ( kitchen,bathrrom,bedroom) and then the next day we acted like nothing happened until we were alone on th enight when she nealed down and unzipped my pantd and started to suck on my c*ck.