A few days ago I was on the phone with my sister and she told me about something that happened between her and our SIL. I'm sure that my SIL doesn't realize how rude her comment was nor that it was not taken as a joke by my sister.
Sister: Thanks for coming to this concert!
Sister: Because you're here, [brother] is babysitting my kids so I could come, too.
SIL: Sweet! Birth Control.
Seriously? My jaw dropped. I understand that our SIL has no desire to have children and, despite being a teacher, does not like young children. What I do not understand is how she can basically insult someone's children to their face - especially when they're family.