The problem you will run into is the spouse possessing the firearm.
While you may not be prohibited, the spouse might be (depending on the crime). If you live with a prohibited person and don't lock up your guns so the prohibited person can't get them, then that person might be construed as possessing the gun. Even if you do lock up your guns, you still run the risk of making friends with the government.
I don't know ohio law. But be careful about thinking she isn't prohibited if it was a misdemeanor. Some misdemeanors can make you a prohibited person.