So let's put it this way:
1) You're with a girl that you like, you go out for drinks, you both get drunk, you both check into the same room.
2) The girl goes to the bathroom and starts taking a shower; leaves the door open.
3) At this point you might not know she's sick or puking, you just hear the shower running. (We don't know the body language that took place earlier, You might have gotten signs that she was sexually into you and you already knew she's in an open relationship, aka don't appear to be off limits, especially after checking into the same room instead of her own).
4) You then make the wrong call and proceed to join her in the shower... what were you thinking?! She says, NO!
5) This is the pivotal moment... You don't force yourself on her, don't insist or put up a struggle in any way, but instead step back immediately, you both have a conversation about the incident and you acknowledge it was a mistake, after all you were both very drunk. You both put it behind you and determine you'll continue to be friends, which later turns into a consensual sexual relationship.
6) #Metoo is created over the Harvey Weinstein incident and the person decides to share a moment that she experienced and mentions the incident which she simply labeled as "Creepy" and not sexual assault.
This sounds to me like what took place based on what I've read so far. Does this constitute sexual assault? we'll see what the courts determine, if there's even a case brought. The way he's handling it is another story and maybe why the meltdown is taking place, but let's not lose focus of the facts.