Or Divorce: Other Attorney Told Me That He’s Tracking My Car?

I’m self-represented and my ex has attorney - he emptied all our joint bank accounts when he left so I’m in a pickle… but his lawyer is incredibly aggressive. In the last email, I told him I wouldn’t be able to make the trip due to our sons illness (which is allowed) and he told me that he’s tracking my car? To argue that my son is not sick. He is. But that’s besides the point, isn’t tracking someone’s car illegal? I don’t think he really is cuz I haven’t gone anywhere and he’s saying I have so it’s not accurate anyways but just the fact that an attorney is saying he’s tracking a unrepresented single woman…. Idk it’s just creepy.