I didn't understand the therapy episode at all, possibly because I fell asleep halfway through it. The final episode did bring things together quite well, but my goodness it, too, was slow in parts! I fast-forwarded through a long scene of Joy chomping cakes, removing her shirt after the second cake and then chomping some more. Then she lay on the floor for a while in her stylish underwear, like you do. And there was a bit of a preoccupation with laundry throughout.
At least it did, in the end, lead us and the main characters to the conclusion that relationships are complicated, and that you can't separate sex from love and loyalty.