BM ruins another Father's Day😢

My SO has twin sons with his ex. Last year she refused to let him see them on Father's Day and this year she takes them out of state on Father's Day eventhough there's a court order that says he's supposed to have them. I hope I can just keep him busy today so he's not thinking about it and feeling down. Of course he's going to take legal action and file contempt on Monday, but he will never be able to get time back with his kids. I don't understand how some women think they're the only ones that should have rights to kids or should be the one to deny access to THEIR kids. Just because he left the relationship doesn't mean he left his kids and doesn't want to see them or be in their lives. Don't you see that you're using your kids to get back at your ex?  Nothing about that is right. Your kids are going to grow up and they're going to depise you for interfering with their relationship with their father.