This part:
「
He alleges Tracy wanted a “sugar daddy” who would regularly pay her money in exchange for sexual and romantic favors.
」
Michigan State University head football football coach Mel Tucker is the subject of an ongoing Title XI investigation, according to a report from USA Today. He is accused of sexually harassing Brenda Tracy, a rape survivor and advocate who worked with Tucker to educate his team on sexual violence.
statenews.com
That's per his official filing with MSU.
I suppose it leaves the door open that he never accepted the "terms and conditions" -> therefore it's not prostitution.
However, then it's arguably not consensual.
Outside looking in: They "agreed" to something, he used services over phone once. Then he didn't pay. And so now she's claiming he just randomly did this.