I would rarely ask for help from an ex anyway but even more so when it has to do with your SO. If you're having problems with your husband, the last person in the world to even consider talking to would be an ex. Even in the best case your husband was an an understanding person, it's just too high of a risk to take and IMO totally inappropriate. An ex has no business helping you with your own relationship problems. They didn't understand the first time, that's why they're an ex. why would they understand now?