Well they've been married for over 10 years haven't they?
There's a bit of an age difference but he won't be the first older man ( read for that wealthy ageing sugar daddy) who wanted a bit of eye candy on his arm.
I expect his critics who aren't keen on his attitude to women will scrutinise how he interacts with all women.
Talking of body language, at the Inauguration, wasn't Hilary Clinton caught looking daggers at Bill (of cigar fame) .. after catching him eyeing up Melania.
You'd have thought for one day of the year he could have kept his swivelling eyeballs from straying and focused on the sobriety of the occasion.