Will, heartbroken that his dad is unfaithful, tries to foil his father's paramour by getting her somebody else.
Meanwhile, Karen banks it all on the ponies, with the purchase of a racehorse. She at first frets over its health and living conditions. Then she discovers that the horse has a more active love life than she does. Which is saying something.
Jack, as usual, plays the part of calming her down, getting her to see the humanity in every horse and that Nature intended the animals to roam free and love whom they wanted. Oh, and make their owners a heck of a lot of money.
Good showcase for Karen and Jack's very odd but true sense of helping each other in times of trouble.