X boyfriend and x girlfriend together in a hospital room?

I went to visit my boyfriend, he had an accident in the hospital. Now you would never guess who was there? that's right his x. Now how would you have acted if you walked into that situation? She was with other people but it still makes me think and wonder. I said hello and good bye. I then called him and told him i was not intending to go visit him again. He currently lives with me. So am I just being paranoid? Or do you think that they will be getting back together? They were not snuggling or anything, what do I do? Help