I think its a bit more complex than that, for example who the family members are, do I know them well , are they responsible people are all factors.

I told my Honey her mum is one WE can take some care of as she only has a small pension but I also noticed the pressure she comes under from others and I told her and she has passed it on that before I give any thing to them I would give it to my grown up kids.

She is of course free to do what she likes with her money that she earns, I think this all can change as we grow together as a process of trust and understanding but setting the ground rules in the beginning is a good idea and can be helpful for your lady .