Wtf lmao you're an idiot

I (31F) have been with my boyfriend (30M) for a year, and we’re moving in together. I do accounting so I’m calculating our finances to estimate what we can afford. I noticed a $1000 charge EVERY month on his statements. I asked about it and he said it’s for OnlyFans woman. He says he's never cheated and never will and he's never met or talked to this woman. She's American so he says there is no chance of anything happening, but there’s no reason to stop paying once we live together.