“Friend” told me not to have a second child

I’ve been friends with her for like 6 years I’m 20 she’s 18. I’m married, we are currently buying a house, we run our own business. We are financially stable. She’s never lived on her own or anything never had a boyfriend and she’s telling me not to have a second child because it will ruin my life saying how gross I looked when I was pregnant and everything else, asking why my husband would even want to have sex with me (mind you I lost all my baby weight and have a flat stomach again) is it really her place to be telling me not to have a second child? She claims she knows more then I do because she took special classes about parenting and she works in the child care industry (she baby sits her neighbors kids😂) am I wrong for getting pissed off about this??