Two alcoholics together rarely works. It isn't just double the trouble but actually much worse. So I don't doubt Tim & Denise's house was like a war zone at times.
But it was a great excuse for either one kicking off at times----Tim blames her drinking/she blames his drinking. With this guy she doesn't have that excuse. She is the only alcoholic in this relationship(so far) & has lost using her partner as an excuse for her meltdowns & diva tantrums. She is a dopey tart really. With temper issues.