if you are hungry, why buy yourself an entire meal when you can go around the supermarket tasting samples from the sweet demo ladies. (or insert cow and milk analogy here)
we all want a quick fix. someone to take our problems away or at least destract us from them. it takes the responsibilty of decision, change and hard work away from us!
heres the thing. if this person is unhappy in her marriage. then closing her eyes and pretending she's not really married isn't the answer. dating the first person who shows us attention isn't the answer.
you can't run away from yourself. this person is a married lady with a family. she can't live in a fantasy world and pretend that isn't the case.
if she is not happy being a married lady...then take the steps to get out on her own. own up the responsibilty of her wants.
once she is on her own, supporting herself...she will then be free to date whoever she wants. and she probably won't want the tom cat.