Almost a guarantee she will finish filling at foaling, so don't worry. She looks like she could go after a few good rolls to finish lining that baby up! So I'd be watching her very closely. This could be it very soon..... if she's good to us, especially if she's exhibiting some odd behavior !!! Make sure she has some outside time, as exercise and room to roll is important in helping these ladies position their little ones just perfectly.
Praying for an uneventful and safe foaling for you. We're very anxious to read of you happy news!!