I Regularly Fuck My Bf Dad

So my boyfriend is 2 years older then me and we have been together for a few months. He is celibate, I knew that we started dating and I told him iwas fine with it. He decided to become celibate because 2 of the girls he was sleeping with at the same time both claim he is their baby's dad but that is debatable and the a whole other story.
Anyways before meeting me he decided he would go a year without sex because he felt he had lost all self control. I admire his discipline and I really love him. But I also love cock. I have been cheating on him with randoms. But more recently his dad.
His dad isn't really old about mid 50s. It all started when he took me to meet his father. His parents are divorced and his dad's home is about 10mins from mine. When I met him he kept watching me all evening. He is really handsome so I watched him too. After we had dinner his father excused himself and left us on the porch. I then asked my bf where the bathroom was. I walk in and didn't knock. His dad was taking a piss and even tho his cock wasn't erected it was a really good size. He looked at me and I walked out quickly. I purposefully left my gloves so I could go back the next evening without my bf.
I went back about 7pm the next day he looked a bit surprised to see me and I asked if he had seen my gloves he laughed a little and he invited me in. He asked me if I wanted to talk for a while and I said yes and we sat not saying anything. Next thing I knew his finger was in my pussy. He knelt before me and licked my clit. It was so so good I started to moan so loudly and he got really hard. Before I knew it his cock was in my mouth it was about 8inches or more I took the whole thing. I even licked his balls. When I was finished sucking he took me to the bed room and fucked my pussy his cock was so good. I spent the night and from then I have been spending the night there whenever I can. I love my bf but his dad owes my pussy.