how much cum?

I feel like I'm not satisfying my man): lately when we have sex he 'cums' but I feel like he doesn't cause usually I'm dripping cum after and lately nothing comes back out after sex. Is this normal could he really have cum? We're both trying to have a baby. And no he is not jacking off before and we've only had sex 2 times this week. Idk why it wouldn't be a lot more): and I don't want to embarrass him by question that