Have you said anything to these people? If not, you need to grow a pair and stand up for yourself and your kid. Not okay.
My sister, yeah, I've talked to her. She's my sister, also my best friend, no kids, younger than me, and annoying. Her I'll get over.
SIL, notsomuch...two kids, homebirth, four and six hour labours respectively. A conversation is being had tomorrow over this. DH heard it today for the first time and is damn pissed now.