As long as its another woman and im invited next time then Im all for it! If its not Ill send Melvin Goodrum round with Queen Vissy to run a train on the guy.
umm..she is calling you old..trust me, it is not a woman that she is fucking
women are interesting in that way, they will tell you the truth, you just need to listen
basically she is fucking some studd whom she is not emotionally attached to. Being an emotional creature she felt some obligation to inform you. In a typical man fashion you at first deny this fact, then in the second phase hope that it is a woman.
Not worry, she will get tired of him pounding her pussy causing soreness that last several days. She will then appreciate the emotional comfort that you provide, on the plus side expect her to increase to her domestic behavior.
hope this helps