Ben decides to tell Ted and Lesley that Tanner walked in on him and his new girlfriend during an intimate moment but finds that they're uncomfortable with the subject of sex. Meanwhile, Liam learns that Preston has no experience with women so he sets Preston up on a date with a more experienced girl.
Ben's mother Carol arranges to meet him at The Shackletons and is invited to stay where she goes on to reveal details on Ben's younger days and then to counsel the rest of the Shackletons against Ben's wishes causing mayhem. At the same time Ted is hosting an important work event and it goes from bad to worse because of Carol's meddling. Finally Ben snaps out of his trance and puts the family back on track again.