Looking for books where the MMC is the FMC’s friend’s dad (divorced or widowed). Basically a friend's dad romance with the friend's mom out of the picture (not cheating)

I am kinda curious how a story where "your friend turned into your stepmom" theme happens. It sounds like a fun concept

Age gap is expected for obvious reasons

Preferences:

• Contemporary, HR, Western or Fantasy would be fine
• No cheating but OW is fine
• HEA
• No monster/supernatural/alien/mafia
• Opendoor once they get to that point (the spicier the better)
• No 3rd act breakup if possible
• They get together early so that we get to see them explore the unique social situation they have. Also I wanna see FMC and her friend get that awkward potential step mom realization moment
• Preferably no love triangle with her and her friend

Any recommendation ? Thanks