Can My Soon To Be Ex Do This? Taking Half The Profits From My Own Handicrafts?

My divorce is supposed to go through next month, and my ex has been atrocious. Before the divorce I was a stay at home mother, and I have two little boys under the age of 5 whom I have sole custody of. Since I had been out of the workforce, my parents took us in and though I have tried to works several jobs, my unemployed ex husband has employed several very creative and devious ways to keep me from staying employed, from harassing calls, to absconding with a child. I still have bills, and though my parents can help, and have, I would rather do it myself. I am a talented seamstress and started to sew infant car seat covers and sell them on my city’s online classified site. they const about $10-$15 dollars to make and sell for $25-$30 a piece. Thus far I hav sold two, and have 3 more ready to go. My ex found out about it and began screaming that since we aren’t divorced yet, he is entitled to half of my “business” and that he’ll sue me for tax evasion and that he;ll sue for the ‘business and take it from me’. For one, its not tax season yet, and I have kept receipts of materials and of purchases, and intend to claim it and for 2, its not really a business. Its not large-scale, I’ve made $40 in profit. Can he even do this, or is he just being an entitled jerk? I mean, he isn’t working, and hasn’t worked for two months, paid nothing to help the kids and done nothing but harass me day and night. I think I should be entitled to profits from my own ingenuity, and its diapering my baby.
Is there even a ‘business’ to sue for?