The Plug of Intimacy

The Plug of Intimacy is a book in the HD Universe, which is mentioned in Grand Theft Auto V. It is a parody of the second book of the Fifty Shades trilogy, Fifty Shades Darker. The book is the sequel to Chains of Intimacy and a prequel to The U-Bend of Intimacy. The book follows the life of Jane Vixen after leaving Lesant Diangelo who comes back into her life thanks to her mother. The book is written by Terry Bolan and is an international best seller.

Chainsofintimacy.com's synopsis

However, things heat up again a year later in "The Plug of Intimacy", Jane Vixen is shocked when her mom brings home Diangelo from a society luncheon he was speaking at. Things quickly spiral into passion as Vixen and her mother become submissive sex slaves of Diangelo.