"Hostile environment" harassment may acquire characteristics of "quid pro quo" harassment if the offending supervisor abuses his authority over employment decisions to force the victim to endure or participate in the sexual conduct. Sexual harassment may culminate in a retaliatory discharge if a victim tells the harasser or her employer she will no longer submit to the harassment, and is then fired in retaliation for this protest. Under these circumstances it would be appropriate to conclude that both harassment and retaliation in violation of section 704(a) of Title VII have occurred.