Rebecca's Lover... Not had two plots. Since one makes the title, I'll presume that Rebecca's Lover is primary, and that Sam's Suport Group is secondary.
The Lover theme gets old after a while: A woman interests herself romantically, not aware that the target of her affections is gay. Rebecca Howe's interest is terribly exaggerated and overboard - even for the ditz that her character has become.
The show's sub-plot held my interest more: Sam begins a support group for people who have had high-priced cars stolen. It was similarly based on absurdum feelings and exaggerated reactions. But at least it was original.