I don’t belong here but would appreciate some input please 
DD is married to a barrister, alongside his job he also teaches law at a university. He’s done this for years now but wants to take time out to do a phd in order to teach at a university abroad where his brother lives.
DD supported him through his legal training and would be picking up the slack if he went back to studying. He says it’s necessary but as he’s already teaching here, it just seems frivolous to me?
Is it a necessity?