It's a Living S02E04 - The Wedding

A wedding is about to be held at Above The Top, which causes a problem for Cassie, when she finds out that her old boyfriend from Kansas, Tom Morton, is the groom in question.  During the wedding ceremony the next day, Tom tells his bride-to-be that he can't marry her and then goes up to Cassie and tells her that he's still in love her, despite the fact that their relationship ended 10 years ago when she left Kansas to start a new life in California.  Meanwhile, the sister of the bride is hit upon by Sonny, who rejects his advances, but then, when the ceremony is interrupted by Tom's decision not to marry his fiancée, she starts hitting on Sonny after she's had a few too many glasses of champagne.

Note: In this episode of It's A Living, the viewer finds out that Cassie Cranston's actual name is Katie-Lou Cranston, a name she stopped using upon arriving in California years ago.