My brother and SIL have started dating, they've met each other several times and it seems they've taken a shine to one another, apparently they've going out for the last 5 weeks. I know this sounds bad but I really don't want them to, I'm worried that it could cause friction between me and the ILs or DH and my parents if some time in the future they were to break up.
He's 22 and she's 25 and there's nothing I can do