As gamblers, we want to be honest and follow the TOS, but what if you’re living in a house where your family also loves to gamble and you all use the same site?
Pretty simple solution, make it so that every family member uses a different casino or bookie, there are hundreds of casinos out there, so there is no need to overcomplicate your life and make everyone in the family play there!
Alternatively, you could all use the same account, since it's family I don't see why you couldn't trust each other with the amount you play and win, if that is indeed a problem them maybe you need to solve other things first, and worry about gambling further down the road!