I can see how an employee could face disciplinary action for using social media in a way that is detrimental to the employer's business, but I can't really see how an employer could ban an employee from having personal social media accounts that are not related to their job, e.g. if Clemmie wanted to come back and just do (say) fashion and/or interiors.
Surely what someone does outside work is their own business, provided it doesn't bring the employer into disrepute?
If she is somehow banned from having any public account, would she not be more circumspect about gallivanting all over her husband's account and him talking about her night shifts and catching babies etc? Let's face it, both accounts are pretty much joint husband and wife accounts in all but name.