Step-Mother Made Me Do It

Dear Diary
Things have gotten really strange around here since my 18th birthday and now I know why. Step-Mother has been wanting another baby for years but she is unable to conceive. The other day she started talking to me about it and told me she had a plan. She shocked me by asking me to get pregnant by step-daddy but I agreed after a bit. I'll do anything for Step-Mother.
That night she started getting frisky on the couch then blindfolded him and had me take her place. I kissed and teased step-daddy to warm myself up a bit then got him undressed. His cock was bigger then I imagined so I took it gingerly in my mouth.
Daddy sensed something was different but didn't say much I couldn't shush until I started riding his cock. Step-Mother came in and began to masturbate and talk dirty to him so things went as planned. I rode step-daddy awhile and after I quietly came he bent me over on the couch. Within minutes Step-Daddy filled my fertile pussy with a huge creampie. Thats when he pulled the blindfold off and was completely shocked. I hope this time worked because I'm not sure Step-Daddy will do it again after that.