Plot summary
While Mike and Carl are working a drunk driving checkpoint, Joyce pulls up. Mike intends to let her through after she answers a few questions, but she is belligerent and insulting so he hauls her into the station. After a few members of the household suggest to Joyce that she cut back on her drinking, she lashes out and insists that they all give up their various vices, before she finally approaches both the situation and Mike with some maturity.
Credits
Adapted from Wikipedia contributors, Mike & Molly season 5. HTML formatting and reference markers removed.