kicking the blanket off

When I sleep while my 3 month old is sleeping I use a sleep sack but when I'm up right next to her (while she takes naps) I cover her with a blanket and put the AC on 72 bc I read that it's a good temp to prevent SIDS however my AC is a AC unit inside my bedroom and it can get very cold since the air is concentrated in my room but she kicks her blanket off anyways. Should I cover her back up every time she kicks it off ? Or should I just allow for her to sleep as she wants ?