Did you know that I stole $50k from my family company over 5 years?
That is insane. How did you manage to steal the money over 5 years?
I've been stealing money once per month since I joined the company
Stealing money from your family company is wrong since it is embezzlement and is illegal. You will be caught when your family company's financial records are audited and the accountant notices the discrepancy. You should return the money if possible and definitely stop embezzling as it will lead to legal trouble and possible imprisonment.
I stole the money because someone took my piece of cake.
Stealing is never right and you should do something else and figure out an alternative to get that "piece of cake" back. Stealing will just cripple your long-term success. It's only a matter of time before you get caught and lose your family's trust.