Kate sleeps with Will's trainer, Zac (Hayes MacArthur), and later complains to the gang that the sex was awful. She breaks up with Zac via text, causing the mopey Zac to refuse to train Will. Will gives Zac some tips and begs Kate to give him one more chance. Following a night of great sex, Kate is horrified to learn that Will taught Zac all the moves he used. Bobby and Andi look for a nanny to reduce the amount of time that Andi's smothering mother is in the house watching Charlie. Elsewhere, Lowell pleads with Jules to wear his great-grandmother's awful-looking gown at their wedding.