I was told a couple of weeks ago by a girl who once dated the guy my sister is going out with that he's in fertile as a result of a rugby injury.
My sister just told us that they are together and plan on getting married next year. There's always been sibling rivalry between my sister and I so I don't think me revealing this would look good at all, considering I'm single and not getting married.
For all I know this might not be true, it might have been the other girl just stirring, I don't know. My sister has always loved kids so this would affect her if it was true.
It's a catch 22, damned if I reveal, damned if I don't. What do I do?