- I wouldn't mind at all
- I would feel weird, but I wouldn't stop them if they liked each other
- Absolutely not okay, and I couldn't be friends with them if they did
Most Helpful Guy
I don't think the relationship would bother me, though I'd probably be more careful about telling either of them anything I didn't want the other to know. Where I think the problem could be is if they break up and some point and then your brother wants you to end your friendship because he hates her or your friend refuses to go anywhere with you that your brother might be or is constantly trashing him around you. So personally I'd be more concerned about what happened after the relationship ends that while it's still going on. Of course there a chance that they end up together for life, but way more relationships end than continue for life so the odds are against that.
Most Helpful Girl
Speaking from experience, that doesn’t go very well. Both on the friendship, as people tend to spend more time with their SO than their friends, and the relationship the siblings may share, as if issues arise in the relationship then the sibling may be upset about their other sibling speaking to their friend. Plus the inevitable awkwardness of the two break up.