My god..I am so Glad my Family is not like that. They'd be happy if I remember sending them things for sure but they would send me text messages asking for something. You should learn how to say no. If you can't afford what they've been asking for you. Tell them it is not busy working our butt off here. We don't just pick up money on the road.
Say no..and be honest and tell them how you feel about them asking stuff. It's okay to give once in a while but there has to be a limit. They should know it. Just an opinion.