I think “your ice cream” is perfectly appropriate. The flip side to seeing wealth as communal is that you need to respect the division when it happens. As cust

I think “your ice cream” is perfectly appropriate. The flip side to seeing wealth as communal is that you need to respect the division when it happens. As custodian of the family’s money, you bought everybody ice cream. But some of that ice cream is now yours. It’s your fair share of the ice cream, you picked the flavours and the sprinkles and what not, because it was for you. It’s entirely appropriate, and indeed desirable, to assert ownership over that. Not respecting boundaries is a Bad Thing. What you can, and should, teach on top of that is generosity. “This is my ice cream and mine alone, but you can taste it if you like.” That sort of idea. It’s your decision to share, but sharing your ice cream with me means you get to see my smile as I try that really good flavour you asked for, and that smile is really valuable.