Grandpa showed up while i was masturbating in chair

Dear Diary,
After my mom passed Dad and I had to move in with Grandpa in order to pay the bills. After a few weeks I got to know everyone's routines and set aside some "ME" time. I was in the comfy chair masturbating when Grandpa showed up unexpectedly. He started to scold me but I was so turned on I threw caution to the wind and seduced him with a hot blowjob. Apparently Gamps hasn't been laid in awhile, he blew a huge load in my throat.
Later that evening while Daddy was out at the bar and Grandpa was already in bed so I decided to "cuddle" with him for awhile. When I snuggled up next to him his cock sprang to life and I couldn't help myself. I started sucking grandpas cock while he played with my pussy. I got so turned on I climbed on top and slid his huge cock into my waiting pussy.
It felt so good in my tight hole I came almost immediately. Several orgasms later I turned around and rode him pretty hard. As soon as my orgasm hit Grandpa lost it and came deep in my pussy. I freaked out because I'm not taking birth control but there are options. At least if I do get pregnant gramps doesn't share my genes.