[MF] I fucked my engaged coworker while her fiancé was out of town, after watching The Lorax

So my coworker and I had been flirting for months and she would call me when she was dropping her son off at school and I was on the way to work. I had just gotten out of a long term relationship so it was nice to have someone to talk to that seemed to care about me. We got fairly close doing this but nothing ever got physical. Until one night while her fiancé was out of town for work, she asked if I wanted to come by and help her make a cake and possibly watch a movie. I get out to her house, we make a cake and as we are watching the movie (The Lorax for anyone wondering), she got up to go to the kitchen and get something to drink.
I decided to make my move then. She had told me previously that the one thing that makes her melt and lose control is when someone bites her neck. So, I wrapped one arm around her waist from behind, pulled her pony tail then kissed/bit her neck. She kind of pushed me off and told me to go back to the couch. Then she brings me a glass of bourbon and one for herself and cuddles up next to me. She says we have to wait for the movie to be over. About 20 minutes later the credits start to roll and she immediately gets on top of me and we start making out. Then she unzipped my pants and gave me the best head I’ve ever gotten in my entire life. Then pushed her down on the couch, took her pants off and to my surprise, her pussy was pierced. I ate her out for a while, fucked her from behind on the couch and when I got close I asked her where she wanted me to cum. She said “you can leave it inside. I’m on birth control”.