Fiance horny after my father died?

My father died yesterday afternoon of old age. I was at home when i found out and when my fiance came home from work i was a reck. Sitting on the couch sobbing. He came in and he was trying to comfort me. He was hugging me telling me it would be okay. I felt so safe in his arms. And then i moved closer to him and i felt an erection. This totally disgusted me. He was trying to hide it but i immediatley pulled away and told him to leave me alone. We haven't talked at all since then i have been locked in the bedroom. This just totally disgusted me. I mean why would my suffering turn him on? And shouldn't the fact that my father just died be enough to kill any sexual feeling he has? What is wrong with him? I am just so mad i can't even put it into words.