True or not you informed them I don't see anything alarming about that being a matured man you're responsible for yourself and how you make a living shouldn't be forced out of you to explain just to satisfy others curiosity. When family members get to have a clue about your source of income and how much money you probably be making, they tend to increase their billing on you base on what they believe you're making either monthly or weekly because it's captured that you can afford it. So keeping them oblivion saves you to a large extend.
I like that last statement, if you give them idea if how much you are earning then the obligation for paying bills will be the next thing that you'll see coming, if they have the idea then they will put more for your monthly or sometimes even the daily as you are in the house and they'll think that you need to help, sometimes it's best not to let them know and just give whatever you can afford to help, in terms of other concern it will be on you if you want to share and if how vocal you are from your family.
Yes that's what family do I mean the extended family especially, a portion of them possesses that feeling of self entitlement. I have this friend that is currently facing this situation and he hardly have money left as savings for his personal upkeep and it's really affecting him that a day don't go by he doesn't complain to me how he regret giving knowledge of his income range to his family and the worst aspect of it is that he's this too generous kind of person who hardly says No to family.
The crux of it is that the less people know about your income the less inputs on demands comes.