She will either walk or crawl when she is ready to do either - whichever may come first. Oskar never crawled... he actually got around doing the bum shuffle and then walked at 15 months and crawled (playing around on the floor) probably at around 17/18 months??? I found it quite funny to see him actually crawl. So, in my opinion, no it won't hurt her. She is still using both sides of her brain to do what she is doing now. It's funny how our mother's and MIL's are so hell bent on things HAVING to be done certain ways in certain orders. My mother was trying to FORCE Oskar to clap and crawl at 5 months old and I'd have a baby very upset and crying whilst telling my mother off and to leave him alone. I think she's doing just fine!