Although you have a maintenance obligation towards her, if she does not try to find a job and thus contribute to the running of the household, you could only get rid of that maintenance obligation through the courts, so that this situation is contrary to good morals. It's a very difficult situation, I could advise you to just throw it away, but it might not turn out well. It is necessary to focus on why she lives like this, why she is not trying to achieve something, you write that she is studied, which means that she can achieve goals, only she is currently in a long-term situation where she has given up everything. Why??? I would go with her to a psychologist in your place, so that you find the cause, then you will be able to start solving it.