@Reality
I had a wife and a girlfriend like that. They gave away my supplies, medical stuff and tools until in the end I had nothing.
In that situation you only have a few choices.
1) When the SHTF you bump your wife off and hide.
Otherwise your stores will go to your extended family. You won't have a say.
2) You prepare for the whole lot of them.
3) Put aside everything you can towards 2) but split the load so that only you know where certain stores are. Feed the extended family for as long as possible until the food runs out. By then they may just leave.
4) Give up now. live the high life now and buy a few bottles of strong booze and go out in an alcoholic stupor.
I'm trying 3) but my OPSEC is different.
You really need to think about and sort this issue. It really is life or death.