My client [M] confessed he wants to fuck me [F] ?

Recently a guy I know told me that he’s been thinking of me while having sex with his gf. I feel really bad but hearing that sort of made me wet.
Because of quarantine we usually meet over Skype, but I needed to get his approval for something, so we decided to meet at his home to go over everything. I wasn’t wearing anything particularly sexy. Just jeans and a basic top, but he had it so cold that my nipples got really hard. That’s when the long stares started. I’d catch him trying to steal glances. His eyes flickering back up when I would look at him mid conversation. He was so preoccupied that I finally snapped and asked if he wanted to do this some other time.
And instead of him giving me a line about being tired or something similar, he confessed that he’d been struggling to get me off his mind.
He said that he thinks about my ass and tits a lot, and that he “blows his load” while doing so. We met through a business collaboration so it was initially very professional. He’s been kind of flirty but I didn’t think much of it until the confession.
After he told me, I was alarmed by how turned on it made me, so I excused myself and left.
We still have to work together for a little while longer and I’m unsure what’s to come. He’s since apologized and said he doesn’t want things to be weird, and I don’t either…but how can it not when my pussy literally throbs when seeing him now?!