That’s Not Your Brother
The comment underneath this Reddit user’s post holds so much truth. “That’s not your brother, that’s evil.” They couldn’t be more accurate. Whoever sleeps with their own sibling’s partner is a horrible human. Even if you really don’t get along with your sibling, it doesn’t give you permission to sleep with their girlfriend, let alone their first girlfriend.
That’s something that can ruin a family forever. We’re sure, that after this person heard the news, things changed in their family. Maybe it’s something they can look past one day, but once that trust is broken, there’s no going back (via Reddit).