Would you destroy your marriage over someone from your past?

My friend's spouse and she have been married for about 12 years. There was this girl he wanted to date, but she moved away. She has returned from Illinois to Memphis. Her mother appears to be causing a problem by adding her husband on Facebook. Her mother disrespects his wife by calling her daughter and informing her about the man. Now that she has returned after all these years, she is attempting to spice things up. This girl cheats in every relationship. She has a child but didn’t bother to tell the guy he wasn’t the father until teenage years.

Wonder what things could have been like and just reconnect with her
Leave her in the past because I found someone better and beautiful
Leave my wife for her although this girl constantly cheats
Leave my wife for her
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1 y
I forgot to mention since she moved back she been getting evicted from every apartment there is…
Would you destroy your marriage over someone from your past?
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