Trish and Chuck Waffler have no choice but to let Trish's mother, Vera, move in with them. Although it's only meant to be a temporary arrangement, antagonism sets in almost immediately.
If having the woman living with them isn't enough, they're having to deal with increased pressure from their jobs. The stress has taken a toll on their relationship to the point where they've decided to seek help from a marriage counselor. And having the in-law from Hell constantly making disparaging remarks and throwing insults at them isn't helping any.
What they never expect is the effect Vera's whining and demands will have on their nearly nonexistent sex life.
Which will lead to a decision they hope will solve all their problems.