My grandpa caught us rimming and sucking

I visited my grandfather with my boyfriend for a few days. One evening we went to his guest room because we were both so horny. I knew that my grandpa would soon wish us good night and catch us, because I know when he goes to bed. I found the idea very exciting that he would burst into the room while I had my boyfriend's big cock in my mouth sucking it with pleasure, and at the same time my boyfriend was licking my hairy asshole! And that's exactly when my grandpa came in! He then walked out again and said he will come back later because he wanted to talk to us. We then just continued having sex. It made us both very horny that he caught us! At one point I was fucking my boyfriend's mouth really hard and was very close to cum! Then I heard footsteps outside the room, which made me so horny thinking that maybe my grandpa comes back inside. Then my grandpa really came back in, and at that exact moment, I shot my entire load of cum into my boyfriend's mouth and experienced a very strong