Birthday advice

Want to surprise my wife for her birthday with another lady. We have never tried this but she told me many times that she dreams of threesome with another lady. I don't know her expectations or dreams in detail but i believe that are very soft core. Knowing her i kinda imagine that she would like to experience this together, to touch, be touched, maybe more to receive pleasure and sensation than to give it. I have no need to be in any physical contact with the other lady but knowing my wife she would not do this if i dont part take, even only with her. I believe we need down to earth, relaxed, carring, healthy and clean person. Someone who takes things slowly since this would be her first time. Looks do not really matter i believe as long as the character is filled with positivity and tenderness. We are both 37 years old, we are a doctor and engineer, healthy and decent looking. Also we are parents so we don't need (at least from this standpoint) complications and publicity. It is imagined as an intimate action without any guarantees that will happen if the energy is not right or she doesn't feel ready or right.
So if you feel that you can take pleasure from a role like this and you want to be a sexual gift to an inexperienced lady, write. If we agree to take the next step I will tell her that there is a person and we can invite you for a dinner with some wine at our place.

Thomas