When my wife Kate first began having sex with other men during our marriage, it was with friends of mine or the husbands of couples we know. I was always there watching as my wife seduced the other guy and watching, stroking my cock, and eating her pussy after the other guy fucked her. As my wife became more comfortable having sex with several different men, we expanded our fun to include men my wife would meet during her normal everyday activities.
I found that I enjoyed eating my wife's pussy after she had sex with other men alone, even with men I had never met and had no idea who they were. As much as I enjoy eating the cum of a good friend out of my wife, there is something very erotic about eating the cum of a total stranger (to me) out of my wife.