Ttc and partner issues

So I'm currently ttc with my partner and I'm in ovulation. Last night we had sex but he wasn't able to cum he was just getting sensitive. Tonight though it was similar but then he thinks he came but normally when he does it comes out after a while which it isn't... I couldn't imagine him faking it so he didn't have to keep having sex but it keeps coming to mind... I know he wants a child but in my head I see him having doubts but I try tell myself I'm just putting bad thoughts there myself... I am quite "wet" in there and I mean it could be cum just less than normal but then it could be mine and he's lied to me...