I am now a bit confused - did she sign a contract or not? Was she fired?
I actually am an entertainment lawyer and did talent agreements (among other things). You can't enforce a contract for personal service - e.g. you can't make somebody work. What you can do is enforce a negative injunction - i.e. you can prevent them from performing the same services for somebody else for the duration of the contract. In California, you can't have a contract for more than 7 years - that used to be relevant in the old days of the studios when studios would sign exclusive agreements for their stars but now is only relevant for recording artists.
But I digress - I think people underestimate how valuable it is to be a housewife on Bravo. The job is really ridiculously easy as long as you are the kind of person who doesn't mind your life exposed and since many people seem to live their lives on social media, I suspect that kind of exposure is a positive instead of a negative. The base salary for housewives is excellent - there are incredible promotional benefits since all of them use their social media to promote various products and are paid well for that. All kinds of goods and services are free even when not filming. If they show up at a restaurant, they are comped because they will have a picture on social medial. Their vacations can be comped. Their plastic surgery - hair and makeup - clothing - weddings, parties are all either comped or significantly discounted. Does anyone think Wendy actually paid going rate for the Sip and See or that Robyn paid anything for her Christmas party?