If you are holding joint assets with anyone right now, you should check in with them. You need to make sure that things are still in the status you thought they were in. It's not that you shouldn't trust this person, it's just that things could have changed and you need to stay on top of it. You share the responsibilities and you share the benefits, so no one should feel like they are losing ownership. There is no need to worry, though: everything is fine or will be fine soon.