Our Neighbour Used Me.

I feel disgustingly sick about what just happened with the old guy next door, he fully used me and has me silenced about it. He just treated me like a dirty slut, and now I am positive he's going to want more. He's so old, IDK easily over 50. So, a bit of backstory first.. I love having sex. I recently moved into a house with my boyfriend and my brother. They're great buddies, that's how I met my BF. He's amazing! He's very good looking and treats me well. I'm actually very plain looking, so I'm happy with him. He's my brothers boss, so that's how my brother ended up here. I don't work, just keep the place tidy and make meals, wash their work clothes. So. Like I already said, I love sex. Anyway, I have been having an affair with a hot guy I met across the street. When my BF & Bro are at work, he comes over. We have lots of sex sometimes for hours. I'm very careful about evidence left behind and always hide it well before the boys come home. Like he's always gone by about 3 and they get home after 5. Today was just like most days the past few weeks. They went to work, half hour later, my stud came a gave me my daily thrashing. We probably had sex 3 times, before before he left and I hopped in the shower, washing away his scent and semen. Gotta keep it clean for my BF. Just as I was getting out of the shower I heard a tap on the door. I wrapped a towel around myself and went to see who it was. It was the friendly old fat guy from next door, Bob. We called him Blob behind his back. I greeted him asked what I could do for him. He asked if he could come in for a minute to talk. I said sure, as I widened the door. He walked in and sat down in the living room. What's up, I enquire sitting beside him, being careful to remain covered by my towel. He said, I've been paying attention and you're a cheating little slut. You are playing up with the guy across the road. I know what you do I can even see you and hear you getting fucked. Now, if you don't want me to tell your secret, you can just let me fuck you now, and I won't say a word. I was completely blindsided by this. In total shock, I hadn't said a word and his hands were already all over me. He pulled the towel open moving his face to my boob and sucked it. I was trying to think of a way to stop him, and I couldn't think of anything. He took me too my bedroom and pushed me back onto the bed as he removed his pants. I was totally naked on my bed with a stinky old sweaty fat man, naked and erect in front of me. Spread your legs he demanded. I did, but said please don't do this. I thought you were a nice old man. He said nice old men don't get pussy. With that he moved his face between my legs and began slobbering all over my pussy. It was so horrible and a couple of minutes later he was moving on top of me. I thought I was suffocating as he began to rough fuck me. Lift your legs higher and kiss me. He demanded. I'm about to fill you with cum. I did it and was almost gagging from his breath. Worst kiss of my life. Then he started cumming. Now I was actually having trouble breathing from being squashed by him. Plus he hadn't stopped kissing me the whole time, making it worse. His fat little dick was going off inside me. I said can you get off me please? I can't breathe properly. As he totally collapsed on me. He did and I was left covered in stinky sweat, my pussy full of cum. He left saying, that was the best. See you tomorrow. I feel like absolute trash now. How can I end this nightmare without my BF finding out? I stripped the bed and put it In the washing machine, then began to was him away in the shower sobbing like my life is over. My BF will dump me if he knew I was fucking another guy. Now it's two guys.