Must suck for the dude. He gets relief then instantly loses it as she rewinds time.
Would he even be aware of it? In theory she'd be the only one aware of the time rewind and numerous ejaculations, for the guy it'd be as if he was just ejaculating as normal.
i feel like this is the most chad thing in existence like she gets done with you, and then lets you have another go before you've even started the first time.