Basically Mr. Zoat decided to write a side story where Paul agreed to Holly's proposition of a threesome with her and her girlfriend Karon, about once a month a segment is uploaded, and the lead up to sex is very detailed and realistic. With Karon being nervous and afraid do to the fact that while she likes Paul she isn't sure about having sex with a man so he's very considerate of her feelings, Paul visiting the local adult store to buy condoms and asks the cashier which type should he buy, and him taking time to admire the work he did on their bathroom shower while the girls try to get into the mood with a bit of foreplay in the shower.
Basically Paul still being Paul in a methodical way and a getting a bit annoyed that once he gets to use his massage lessons on one thigh he can't help but be bothered that he didn't get to do the other.