couple questions. Your wife is mad at you for having an Ebay business and wants a divorce because of that? I don't understand what the issue is. Is it because you didn't discuss it with her first?
Second, and I am not trying to be funny, is it possible your W is bi-polar as well? You mentioned your MIL has Bi=Polar disorder and her actions being from 1 extreme to the other over an ebay business seems extreme.
The ebay business I started up was a secret. She did not know anything about it. I jad a previous eccommerce business that I was moving our mortgage and utility payments into (My first diagnosed manic episode) She was hurt over this and that I exposed her to risk since we did our taxes together (I've tried to explain that the business did not exist in 2016, so there was no liability but it falls on deaf ears)
I don't think she is BiP but definitely has some explosive anger issues. I have recommended that she see an IC in the past, and she has thought about it but has not agreed.