Like Carole V and a number of others, Nigella has been on quite a long journey ...
not because she has radically changed her values, I think - more that the fascistoid headbanging racist selfishly gouging fanatics have taken over the Tory party, 2012 onwards to be exact.
It's been clear for a long time - mostly via subtext, because she says very little about politics - that she doesn't share her father's values. She mostly carefully avoided saying anything about Brexit, but a couple of *very* pointed tweets slipped through, although they were later deleted.
Strangling action in public, which he passed off as a "joke", but she got out immediately after that.
Indications are what you mention had preceded it. You don't ostentatiously pretend-strangle your partner (hands throttling her neck) in public if there is no backstory.
