Why not

You could see no reason to turn down Vivienne offer. You quickly give Vivienne her answer by shoving your cock straight into welcoming home. She wraps she legs around you and embraces you into a full kiss. Her arms around your neck. You are ramming into her like a piston. You feel both yourselves start to get close. She cums and screams as you unload deep in her womb.

After you finish, Vivienne makes sure to clean your cock off with her mouth. She even licks your balls and suckles on them. Clearly she knew what she was doing. Probably one of reasons she became a mistress.

"I can please you until Sera returns but I must deal with other matters as well so once Sera is back I must attend to those", Vivienne states while still gently stroking and messaging you.