Bringing this topic back to cards... I used to collect UFC fighter Pat Barry. Transitioned from kickboxing, an undersized heavyweight with exciting fights, win or lose, and an entertaining character.
His girlfriend Rose Namajunas also became an notable MMA fighter, first through Invicta with her flying armbar win all the way to a UFC champion.
An MMA power couple if there ever was one.
Then I read the story of how they met. Rose had a rough upbringing, a child of Lithuanian refugees, a father with schizophrenia that died while she was still young, separated from her family and the victim sexual abuse.
Pat met Rose at Duke Roufus' gym, where she started training after high school. Pat was 27, Rose was 14. He called it love at first sight.
This account was part of an interview that Pat Barry has since disputed, "taken out of context", but not by much. In another interview, when Rose was 22, he claimed they'd been dating for 4 or 5 years, while she said it was only 2-3. Barry has since refused to answer any more questions on the topic.
So while they are still together today, the whole story was a red flag. An adult man had groomed a very vulnerable, traumatized teenager. She has never known any other relationship.
I stopped collecting Pat Barry cards after that. His career was pretty much over by that point though.