My wife and I have shared the fantasy of her with a black guy for years and she now admits to thinking about black cock every time she cums. The often occurs when we are watching IR porn that she wants me to put on (Obviously I enjoy that as well). I bought a black cock extension that slips entirely over my cock and makes my modest 7 thick inches an impressive 10 thicker black inches. She seemed to enjoy that the first few times that I used it, but now she has asked for it more often, in fact she wants more sex lately when I use it. I told her that it turns me on that she wants (and perhaps needs) it more. I think she has gotten over her shyness in asking me to wear it as well as her feeling bad for asking me to. She still enjoys me fucking her without it after she has had the chance to have an intense orgasm with the extension on. I love how her pussy feels afterwards as well. I wonder if she may eventually not want me at all if I use the extension too often. Any thoughts on this? Should I only use it on certain occassions? Or just use it as often as she wants?