

After witnessing some strange behavior from Bridget and Kerry, Cate tries to find out what they are up to. Meanwhile, C.J. and Rory doubt Jim's ability to put an engine back together after he falls in love with a classic car.
Bridget finds her popularity waning because of her exclusive, long distance relationship with Donny, while Kerry's social status skyrockets because of her relationship with Kyle. But Bridget's eyes begin to stray when she meets new kid Damian. Meanwhile, as she waits for the results of her pregnancy test, Cate is stunned when Paul, Bridget, Kerry and Rory seem more concerned about how the baby could disrupt their lives than the blessed event itself.
Bridget is horrified when Cate is asked to fill in as the sex ed instructor in her daughter's class. But Cate is in for a shock when she tries to answer a student's written question about being pressured to have sex -- and realizes it may be from Bridget. Meanwhile, Paul and Kerry are too embarrassed to look each other in the eye after watching a foreign film together that contains a sexually explicit scene.