My son started sitting and crawling at just about 5 months. My neighbor is a child developmentalist and told me that’s not normal and he’s going to have bad posture and core strength because he learned

To young. She said I could’ve damaged his spine by letting him sit???? Is anyone else’s baby doing this? Is it okay? I feel like a bad mom but he seems okay. He just wants to

Do it to play with his sister. I’ll probably ask at his next appointment but now I feel like a bad mom and she’s going to call cps on me