BethennyI think that it is a GREAT idea for Jason to work with you! Your family obviously means the world to you and this is the best way to keep everyone together as much as possible.
I am sure that there are some feelings of resentment from Jason towards your success. I think men are just hardwired by God to be the "head of the household". That means they want to feel like they are protecting and providing for the family. This is an incredible opportunity for your relationship to grow in your support for one another.
Jason gets the chance, ESPECIALLY WITH JULIE LEAVING (YOUR EMOTIONAL CRUTCH) to step up and play hardball in the corporate world on your behalf instead of attacking the designers! And this will give you the opportunity to encourage him and really let him know when he has done something that couldn't have been done without him.
You have said several times on the show "this is not my money this is OUR money". It doesn't feel like his because he hasn't earned it. Let him earn it, let him be the ball buster as you take over the world TOGETHER.
I think that this will help relieve some of the tention.