Yes, it does not matter what way we look at it, every suggestion seems too ridiculous and far fetched.
However, it's not impossible that something totally unexpected happened - or will be said to have happened.
Consider JY changing out of her outdoor clothes - exterior light goes on. Must be GR returning, due to the weather making his trip impossible, she assumes as she dashes to the door and flings it open, wearing next to nothing. "Whey hey" thinks VT as he advances - she seizes that hat stand by the door ... and suddenly things go horribly wrong.
Yes, far-fetched, but not impossible - see latest quotes from trial below!