I want to break up the family over a lottery ticket.
That seems like too much. Why would you break up your family over a lottery ticket?
I want to take it all for myself.
It is wrong to be greedy and try to take lottery winnings for yourself. You should be fair in your dealing because they can sue you and then you all lose most of the money to lawyers fees.
Why should my family be entitled to any of it? I am the one that bought the ticket.
But if they put money towards it, then they deserve some of the money even if you went to buy it. You could even get sued for cheating people who went in on a lottery ticket together out of their share.