Male ejaculation confusion?

Has anyone's partner not been sure if he ejaculated? It's the weirdest thing. My husband and I were doing the BD and all of a sudden he stopped and was like, "oh, I guess the stuff already came out", but it didn't sound like he had an orgasm or anything and he wasn't even 100% if it happened or not. He said it didn't feel like there was anything left in him that he needed to get out? What? We've been together 8 years and this has never happened. I'm so confused and a little disappointed because I'm ovulating and I was kind of looking forward to making a baby today! Hahaha