Which initial attack? She was getting up and probably using arms as balance. Why would you extend out your arms in a wide angle if you are trying to attack? There are myriad ways to attack from that position including a punch or going for the throat or taking something from the table and throwing it, none of which she seems to do. You can at this point only speculate that she was trying to attack not really prove it.
On a second look it is also not super clear if she was using arms as balance as she was moving towards him at the same time. It is still not clear what was her physical intensions though. Maybe she would just push him because she got angry? I think nevertheless kicking someone without the clear intention of equivalent physical harm can not be justified.