>>303 I think a) is your strongest point. He has free time and he's chosen to spend it with TS (and his lawyers/ pr/ agents).
I'm ruling out b) since nobody ever was given time off set to job hunt.
Option c) is probable insofar as she would have been a righteous pain in the arse to come home to during the KK dramas.
The few actors that bring their SO's/ families to set usually do so once only. Everyone's too busy to stop and chat for long. There's plenty of opportunities for them to join in for dinner/ drinks after work if they can be bothered listening to constant talk about set life. She's done a tiny bit of acting, surely she would know this.
I doubt the rest of the cast would dislike her- they certainly wouldn't show their contempt, it's not worth causing unnecessary friction.
I think her need to cling would eclipse her desire to stay away due to boredom.