Sevant to my wife, she wants a black baby?

I am my wife's servant, not a slave, but I do cater to her wants probably more than the average husband. I have helped her bathe, cooked her dinner, rubbed her feet and given full body massages with out any permisteral satisfaction involved. Our sex life is not great due to my small penis, we have always tossed around the possibility of finding a stud for her but never have. My wife confided that she was very curious about the the myth of the black man being bigger. I thought I owed it to her to find out since I was so inadequate. She had her first black experience and now she is talking about having a black baby, do couples really do this?