I think it can be considered assault since his intentions is physical harm. If you wave a bat or a gun at someone and you miss them than it is still considered assault. He is basically doing just that. If she has a seizure and falls and harms herself because he is purposely doing it than it is assault.
@CWOTUS has some good points on what she should do.
Here’s a clip about assault that I found on the internet.
What is Criminal Assault?
State legislatures and Congress define what constitutes crimes, including assault. This means that what may constitute assault in one state may be different from what constitutes assault in another state. If you would like to know the specific definition of criminal assault in your state, you should consult a criminal defense law firm in your area.
Assault can occur even if no one is actually physically harmed. Rather, assault occurs when someone threatens harm. This threat of harm must be intentional.
Examples of assault include swinging a baseball bat at someone but not hitting them, waving your fist at someone without making contact, and pointing a gun, loaded or not, at someone, while they are aware that you are pointing a gun at them.
There are some acts that may cause someone to feel threatened that do not constitute criminal assault. For example, telling someone that you plan on causing him or her harm at a later time is not assault. Neither is pointing a gun at someone who is not aware that a gun is being pointed at him or her.
Aggravated assault is a specific type of assault that occurs when someone commits assault and actually intends to cause serious bodily harm or succeeds in causing serious bodily harm. Aggravated assault is usually committed with a dangerous weapon.
He is intending her physical harm.