My uncle had always been a raging alcoholic. A dangerous alcoholic. Well, my aunt married him anyways. They went to Germany for their honeymoon. Only he returned. We asked about the aunt and he pretended like he had no idea what we were talking about and how he has "never gotten married".
About five years later he married again despite us all trying to tell the woman not to. They went to Jamaica for their honeymoon. Same thing. He came back without her. Again pretended like he's never married. We began suspecting he was k***ing them. We called the police. They investigated. Nothing turned up. And then the years later, he married again. But COVID happened and they haven't gone on a honeymoon.
We're not sure she'd believe us if we told her. So we have distanced ourselves from my uncle and he remains as the secret we don't talk about. We don't talk about Bruno type situation.