Reverend Eric Camden feels old after the twins' young teacher mistakes him for their grandfather and being unable to keep up physically with wife Annie's sexual appetite. Martin gets in trouble with Sandy when she overhears him in the baby-phone thanking Kevin for the -mis-understood- advice to seduce her by cooking for her. Lucy worries what it means about his sexual appetite now Kevin has stopped cooking elaborate dinners after talking to lonely young teenager movie theater tickets clerk T-bone, who considers her highly desirable. Kevin selflessly worries about all of them.

Now Annie is away for four weeks, Eric wakes up with a stiff neck but already promised the twins to sleep a night in a tent in the garden- not so easy as it sounds, especially when the dog Happy goes missing, actually tagging along with Kevin's canines. Kevin couldn't turn down his brother Ben who wants to came spend time with them, but Lucy isn't ready for any visitors yet, so he stays with Eric, whom he assures he can safely straighten his neck having nurse training- a painful mistake. When the twins' attractive young teacher Margo makes a pass at Eric, the principal laughs away the very thought: the old goat must misinterpret. Lucy changes her mind and decides to get the guest room ready for Ben to stay in 'any time'. Eric's cardiologist has crushing news. Eric publicly rages at Margo's unacceptable immorality and takes his kids away, then insists to pig out with unhealthy food as a fake birthday and even lets Ben give him another neck-crack. Lucy smells a rat.

While Annie is still away, Reverend Eric Camden keeps behaving weirdly, so his nosy daughter Lucy forces her unwilling, privacy-respecting husband Kevin to help her find out what's going on. For once he gets interested himself as it turns out there actually is a lot to uncover, starting with the fact Eric bought the twins hamsters as a consolation because his disgust at their teacher Miss Margo's flirting made Eric take the boys out of school to teach them himself. Kevin even ends up taking his pants off as bribe for homeless Stanley to tell what he knows about the hospital episode.