Eh, it's easy to say that, it's harder for it to actually be done. How do you tell family they're nothing more than a moocher and they can go live in a box for all you care?
The cable thing I can say should have been handled by her.
Still, what I'm saying is, as hard as this is on IATA, it's certainly a lot harder on his wife.
I'm sure she could use a little tact, and word that a little better.
The point is...IATA's wife is well aware of what her sister's been doing. Letting everything slide clearly isn't solving the problem.
Sometimes life is hard, Alio. Why should IATA's life be excrement on, because his sister-in-law is a selfish queynte.
EDIT: the only instance where IATA should step in, is if his wife attempts to solve this and is completely rebuffed by her sister.