Is he a cheater?

My man and me had sex Sunday morning, and he ejaculated then. Tonight I just gave him a blowjob 3ish days after we had sex and his balls where not that hard (backed up) feeling as he should. Feels like he's released between now and then. And his load wasn't as huge as it usually is when he gets off in my mouth. I can understand if we been doing sexually activities alot his wouldn't be as huge and balls haven't been backed up but we haven't. I was even lucky to get what I got Sunday morning and tonight.