Billy worked for Illinois Community Services. One of Billy's co-workers, Lisa, routinely engaged in extreme sexual behavior in Billy's presence. Billy and others regularly complained about Lisa's conduct to their supervisor, Angie. Rather than resolve the problem, Angie nonchalantly told Lisa to stop, encouraged Billy to talk to talk to Lisa, and suggested that Lisa was just having fun.

Assuming Billy can show he was subjected to a hostile work environment, could Illinois Community Services be liable? Why or why not?