If you used handcuffs on her as I recall there is a bug that makes the handcuff effect permanent, even if you remove the cuffs. I dont usually use them so I havent ran into this bug myself. I can tell from the picture that its not her brest size, nor anything else obvious like no energy or negative str. The only other thing I can think of is if she has the pet harness? If not then its the handcuff bug. Ill see if I can do some save editing magic to remove the effect if/when I can replicate it myself, but from what I remember there was no fix for this when it was being discussed here. Restoring an earlier save without handcuffs may be the only option. If you havent used handcuffs on them and this is some other random bug, a bit of save editing should do the trick to return them to normal.