perhaps you need to encourage her more always insuring her that you are ok with it, just be sure you can handle it when she makes the plunge, there may be no turning back. My man talked me into it, and at first it was with another woman, and she taught me all about bi sex with a woman and other women, and I loved it, and my man enjoyed the show and getting to play with so many women with me, but when he finally brought home a black man to play with me, well I went wild, my man loved the show and they shared me all night long but it wasn''t long before I was asking for him to come back over, and soon he was coming over when my man was not home, I was wild for his big black dick, and he would fuck me for hours, when My man found out how much I was fucking his black friend, he got pissed, but in time he came to accept it that his wife was a black cock whore and I needed it, and his friend was bringing over other black men to fuck me several times a week. It took him over a year to get used to it, and our life was never the same. be careful for what you ask your wife to do, but she will do it if you keep encouraging her that it will be fun and you are all in.