did his balls over he

[Vladv1]

"Having seen AC/DC at yet another Chequers show in February, and encouraged by the full-on attentions of Bon, who ‘did his balls over her’, as his friend and former roadie John Darcy put it, Judy had hitchhiked to Melbourne to be with the singer".
Mick Wall, "Hell Ain't A Bad Place To Be".
What does the bolded idiom mean?

 

[PeterCW]

It isn't an idiom that I have come across but it looks like a reference to sex.