well, first of all, you must let her express her feeling,she is excited I think with the new attention. I hope you had some guidelines set down,what was uncomfortable to her and you before hand. You just do not meet the other guy in a 3som seperate from your hubby,did you talk about what you would do if different situations come up?? YOU must tell her you are not comfortable with what her has done. I hope the two of you can work this out so you both will be stronger and closer as true lovers. I hope she realize that this is just for fun,not to be confused with "feeling" of anything but yes, it felt good and that is all. It is very hard for a women to seperate love from just good sex,if she feels confused then you must help her to realize that this new exciting feelings,is just part of the "fun of swinging" does not mean she has given him anything but SEX,not loving feelings,some swingers reframe from using the word love. Your age and the years married and background of your wife and you will all play a part in how we should give you advice. We still are learning as we go in this lifestyle ourselves and I hope you and your wife can talk this out and both be comfortable,this advice board is a good start. Good luck and bring her to the computer with you and read and talk together.