Romance- one night stand with no numbers exchanged only to meet at an office months (or a year)later

[Reader]

In which novel idk the characters meet at a bar.the lady is seated at a bar and a drunk guy tries to make a pass at her. she then grabs a man who is passing by and introduces him as her husband. he them asks the drunk to leave her alone. after he invites the lady to his table where he introduces her to his friends. he makes a bet with her that they would end up spending the night together. the next morning, he escorts her to the elevator and back to her room in the same hotel. as she leaves , she left a fifty dollar note for him having lost the bet. On her way out she notices that the guy has bodyguards outside his room.

[Laura]

Similarities to Dr Stanton by T L Swan. That’s the way they meet in a bar in Las Vegas. They spend the night together and she loses $50 bet (but it’s for a sex act, not for spending the night). He loses his phone that night with her contact info, and they never exchanged names. They meet again a few years later where he is a surgeon and she shows up as a resident in his program. It’s not exactly what you described, but pretty close! Good luck!