A quick (and not exhaustive) web search yielded no evidence that the coach is a lesbian; not that it would be news if a women's coach of player was.
There is an organization of lesbian college basketball coaches that plan a number of activities at the women’s Final Four every year.
They have also tried put a provision in the code of ethics that coaches cannot use the sexual orientation of coaches of other schools in recruiting.
Do google image serches for Sherri Coale at Oklahoma, or Kim Mulkey at Baylor, and compare them to the Boston University coach.