Agnes is disappointed with Cathy when she decides to get a boob job to impress her boyfriend, Professor Clowne. Agnes is also distinctly unimpressed with Buster when she meets the man he has hired to measure up her kitchen. Meanwhile, Professor Clowne has a life-changing proposal for Cathy - if he could only find the perfect moment to ask her his very important question.

Everyone in the Brown family has a date for Valentine's Day except Agnes. Can she really start internet dating at her age? Dermot has to prove to Maria that he is still romantic, and Agnes and Winnie are fascinated by Betty's book, the ABC of Sex. Meanwhile, Grandad becomes addicted to Viagra.