Okay I'm not sza (but bipolar with psychosis) but I would like to answer. Disregarded if anything. I also believe schizoaffective disorder is the most severe form of mental illness. Your thoughts betray you and you have horrid mood swings. You need to find out his symptoms and make a crisis plan. There will be break through episodes but caught sooner is better. It takes time to learn and trust. Yes there is a small chance it'll get to out of hand. Have him sign a release to his psychiatrist so you can talk to him in emergencies. When things start looking like they're getting out of hand, if he's not capable of calling his Dr do it for him but remember he's an adult. Also look into an as needed anti psychotic for break through episodes. if you suggest it before he gets paranoid then it'll help until the doctor is available

Most likely his break through episodes will be less severe since you know what you are dealing with. Lastly get therapy both for you and your children as well as a couple the more support everyone has the better and earlier episodes can be caught. Lastly get someone who has experience dealing with sza, sz or crisis. You can't trust someone who isn't strong enough to hold your fears and can't help you deal with them.