How to use "affair" in a sentence

I suppose you didn't notice, but those two are having some sort of romantic affair."

Hotel management personnel, showgirls, dancers, magicians, crewmen, and musicians crowded around the tables, sampling the offerings while Phillippe Chevalier, the hotel's executive chef, personally watched over the affair

"You were the one who started fucking anything that breathed, and then you flaunted each cheap little affair to hurt me

So I will have a love affair with the artist who is painting my picture

'This isn't the usual sort of love affair between Anne and me.'

They are having a love affair

'You have heard about my newest affair?'

She is having an affair with Mensar-Arthur.'

God is good, he brought the coup before her sister's affair became widely known and ruined her name...