It's bad to do shady things behind your partners back.
Mat decided to sell meth for extra money, and his wife is wondering where he's coming up with all this money.
Mat has to make a decision on whether to tell his wife.
Mat tells his wife that he's been selling meth in order to make more money for the family.
Mat tells his wife that he's been making money playing poker at the casino.
Mat's wife understands why Mat is doing what he's doing even though she's not a fan of it.
Mat's wife doesn't believe him and becomes suspicious of what he's doing.