My question involves criminal law for the state of: California
In August my father passed away and left me with his business. I had to keep the shop running while I switched everything over to my name. I tried to open a business bank account, but the bank denied me until I was able to obtain a business license. So until then I used my dad's business account (same business name and everything) to pay for bills. Plus money was still going into that account directly from the shop.
To do this I had to sign my dad's name because I couldn't afford for the bank account to close for any amount of time.
Now my mom and her family are trying to blackmail me because they want money.
I don't believe I did anything wrong and I would like to call the police on them, but I don't want to go to jail for committing fraud against my own business.
So can I really get in trouble for this?

