You might try Carly Crawford, who visits NYC  and offers this service.  No personal experience but she has many stellar reviews in this area.

I love couples

step into my world of pleasure....

Come relax and unwind with me. I am exactly what you have been looking for. Discreet, discerning, intelligent, educated, clever, funny, adventurous, beautiful blonde with green eyes and luscious lips. You will not believe your eyes when you meet me. I'm sweet, loving, fun and very playful. I am always well dressed and well manicured in the most sexy outfits. Im a low volume very high end companion that will leave your heart racing.

Serious inquiries only please.

Be prepared to complete screening and provide proof of employment should you have no references.

Feel free to email me as soon as you're ready if you think we might be a match. I am looking forward to hearing from you and hope to enjoy the pleasure of your company very soon!

Texting is my preferred method of communication

Phone number is for texting only. I do not answer unknown calls.

I've helped many women with their first-times as well as couples begin exploring threesomes. I have a modest upcharge for couples as these types of sessions bring me great joy

I love to connect with couples while helping them stay connected with each other. I live in NYC but have a car and am happy to cross the water for a fun & sexy time