After witnessing some strange behavior from Bridget and Kerry, Cate tries to find out what they are up to -- not suspecting that they might be trying to set up a special Mother's Day getaway for her. Meanwhile, C.J. and Rory doubt Jim's ability to put an engine back together after he falls in love with a classic car -- which is in for a wax job at Rory's new detailing service -- and decides to fix a noise in the motor