My opinion: [remember, just an opinion. Don't know her, Mo or the gentlemen in said video nor did I see said video]
She was interested in and or was with one of the guys in said video. He coaxed her into 3way. Once it was happening, filming happened and she didn't say no to it because let's face it we are all different people in the moment. Video gets around, she THEN regrets it. Naturally, gets in trouble for it. To cope with the disappointment from her parents and save face, decides she will say it was forced sexual assault.
As far as Washington goes. Regardless of his relationship with her, he acquired the video. Stupidly after saving it, he sent it to her as an FU of sorts. Now he's a college athlete and an easy target and will pay the price. From the sounds of it, nobody is innocent here. But laws are laws and most teenagers ignore them and or don't know/understand them or the repercussions of them.
Personally, I'm hoping we can all have more details and more truth come out before throwing him or her under the bus any further.