Who cares, really?
At some point in the past, Trump may have hooked up with Daniels. Stormy Daniels, of course is a porn star, and Trump is now the POTUS. But, I don't know what arrangement Trump has with his wife, and I'm sure that whatever arrangement Donald and Stormy made was mutually agreeable to them at the time.
Yep, adultery is a sin. But, I don't consider the POTUS of any stripe, Republican or Democrat, to be an authority on morals. What happens behind closed doors, as long as it is mutually agreeable, should stay behind closed doors.
This Stormy-gate think is a huge nothing-burger.