Am I Being Unreasonable? Original Owner Wants Car Back

This just happened to me with my jeep. Right after I bought it had it registered, put in a bunch of knuckle busting equity, the kids mom writes me to see if they can get it back. I told her if I’d do decide to sell it I’ll let her know. I still have it. Don’t let it go brother. They had let it go for a reason they live with that decision. If they truly want it back it needs to be 100% on your terms.