Will you share the profit the way your girlfriend demanded it or split it the way the man thinks right which is just returning the money.
Remember that if he lose the money, he will just give it back again secretly since there’s no consent for gambling.
If only this man shut his mouth right?

It's really greedy of the guy to return just the $10,000 alone back to the girlfriend after winning $100M. Although I will not agree to her sharing formula, but I will give her a very good share of the money, because if not for her money that I used, I would not have won such huge amount of money.
I also believe that the girl friend is requesting for 40% because of the way the boy friend just returned the $10,000 without adding any profit. The lady must have felt that she meant nothing to him and she has to use the opportunity to get some money from him, but seriously I would never give 40% that she is demanding, but I will give her an amount that she will really appreciate.