Thanks for asking for me.
You asked: I was told that I would have to pay my husband spousal support instead of the other way around and he is not disabled in any way. Is that true? No, that is not entirely true. Your husband certainly has the ability to work if he was willing to and generally a court will not allow one spouse to just not work, and then seek spousal support, simply because that spouse believes they shouldn't have to work. You would ask the court to impute income to him based on what he could earn if he would go back to work. This should diminish or defeat any claim that he might make for spousal support.
If you have minor children in the family, the court will also use the imputation of income to calculate the child support that he will be obligated to pay you provided that you are the primary custodial parent---which seems pretty likely.
As for kicking him out of the house, as I mentioned, the only ways are through a restraining order if he becomes violent, or through a court order if you file for either Legal Separation or Divorce. That is it.
As a rule courts are hesitant to order spousal support for a former spouse who is cohabitating with another person in a marriage-like relationship----so if he moves in with the mistress there is a good chance that no spousal support would be awarded him, if he asked for it.
You may reply back to me using the Reply link and I will be happy to continue to assist you until I am able to address your concerns, to your satisfaction.
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I wish you and yours the best in 2016,