I spent a lot of time deriding Michael Jackson fans who were certain their man was innocent based on what they knew of him as fans, so I can't now go and say of course Paul's innocent.
I hope he is (of course), and take some solace in that the claims she makes, even if true, are "moment of passion" things, not premeditated or prolonged abuse. This is a couple who broke up after only a couple of years, with a little baby to boot. Things must have gone very very wrong and they must have had some major blowouts