If you do the math you could even put that in the email to show him how much money he's costing his kids each month playing his lone wolf games.
I think right now you need to just get yourself in better financial position so you aren't at all dependent on him or your in laws. As well as building confidence and educating yourself about how to build a better marriage and how to avoid being bullied or manipulated... EVERYONE including myself needs to learn the last two... many of us deal with that during infidelity... we put up with WAY MORE than we should
