Uh, she was at least a bit drunk in the occasion, so i would call it more of a slip of the senses than cheating per se.
Well, on the issue per se, some things to consider are:
- good looks are subject to opinion.
- Isabella is
not a part of the "family business", what in practice means she's a
very unoccupied - and lonely - member of the household: Cordelia is gentle but distant, Gracie seems to not like her, her husband though seemingly loving dedicates 90% of his time to DeLuca business. The only ones who apparently interact more with her are, bizarre as it may seem, Wilfred (as implied from the talks about wine lore & such) and Luna (have you seem her reactions over Luna wanting a makeover help?).
- Isabella and her husband while by all indications a loving couple, have gone through a very personal tragedy and all signs are that his silence on the subject, though he blames her in no way or form, and obsession with work (that might actually be an obsession with
revenge) might be taking a toll in a time she's in profound need of confort. Damn, Cordelia herself has called him out on taking a leave to dedicate some time to the couple, if memory tricks me not.
So, i would say that Isabella, while at present probably not intending to betray her husband in any way or form, is in a very fragile state of mind, one where the MC's nebulous "of the family, but not family, employee but yet not" allows for him to fit in and spark who knows what kind of stuff.
Just my two cents of thought.
Ok,no. Let me be honest here. I have some more stuff to comment upon and say.
Actually...
Damn, i'm on a fanciful mode today it seems.