Even if this was true, which it is not, there is no crime. Not even a penalty. So some HS kid tried to mash with a girl and she rebuffed him? Oh my, the horror.
One interesting aspect of this matter is the age of the participants significantly increases the evidence required to even suggest that the intent necessary for any charge related to sexual assault was present. And that evidence simply does not exist.
For adults, there is something of a presumption that physical contact, particularly in a bed, among members of the opposite sex is indicative of some sexual intent. That is not as true for teenagers, and, for example, would be unlikely among first graders.
For all anyone knows, whoever, if anyone, was rolling around with Ms. Ford 35 years ago was doing so not because they intended to obtain some kind of sexual gratification, but because they wanted to annoy her, or show her how wrestling works, or tease her, or a any one of a dozen other teenage reasons.
I have seen teenage boys wrestling with drunken girls to get their car keys away from them, and nobody present at the time, male or female, thought anything was wrong with that. In more than one case the girl's girlfriends instigated it. I'll speculate that even their parents would have been glad it happened.
Teenagers are certainly capable of sexual assaults, but they also engage is a broader range of physical interaction than adults. Thirty five years later it is impossible to even know what the intent of the people involved, if there even were any, was. Particularly if the person reporting on the activity couldn't and can't remember much about it.