Although, you are not a convicted felon and are not under a disability barring your lawful possession of a firearm(s), unless relieved of his disability your husband cannot knowingly acquire, have, carry, or use any firearm or dangerous ordnance. Your asserting that it is your gun, kept for your protection, versus the State’s position that he knew the gun was there and had sufficient access to it to constitute possession, is a matter for the judge (bench trial) or jury to determine after the trial for an F-3 Having weapons while under disability charge (ORC 2923.13).
Whether you can lawfully possess a firearm may be secondary when you consider the risk implicit in the above scenario.
This answer is offered for informational purposes only. It is not offered as, and does not constitute, legal advice. The answer presumes you are not currently represented by an attorney who knows your specific circumstances.