Got Caught By GF's Roommate

Since my gf and I are both students, we fuck in dorms.
One day, her roommate was out, and she was supposed to be out for a while, so we decided to use the opportunity to have sex. It was long and amazing, as it is always with her. I pulled out my big cock and came all over her stomach. Then I laid down next to her to calm down and with her being covered in cum and my cock still rock hard, her roommate decided to come back. She stood a bit in shock as we tried to cover up and turned around and left to give us some time.
Anyway, it was quite embarrassing.