i rescently went to visit my dad up north california, and he lives in a studio. i took a girlfriend of mine up there with me. the first night there was just a casual dinner and movie at home night. the second night we all went to a bar and my dad invited a friend of his. we all had way too much to drink and took a cab back to his studio. my girlfriend and i were sitting in front of the t.v. while my dad and his friend sat at the table behind us...a while past by and suddenly i turned around to see why they were so quiet. i noticed my dad standing up with his dick in her mouth, i elbowed my friend and we started to giggle. all of the sudden we started fooling around and she went down on me. i could hear my dad in the background moaning. i started to fuck the shit out of my friend and i heard my dad say "make me proud" which was akward but it turned me on even more. my dad came before and i continued fucking. when i came i could see my dads friend starring at us. it was a great night however when i woke up the next day i felt so embarrased we left before my dad could wake up. this happened last week and i have not talked to him since then...i dont know what to do.