Tired of sending money to my mother.?

Before when we were still in PHil, my dad would send us money every month for allowance 200$ to be exact. So my mother never really work as she had to stay home and take care of us. Then my dad decided to get us from PhIl to US. So what happen is since we re not with our mom anymore theres no more reason for him to send money( Theyve been not together for yrs btw). So my sister and I did everything car wash, clean homes for our relatives just to earn money and send it to her. When my sister finally got a decent job she would send money home and offer her to start a business back home, but my mother don t want to becuz there are plenty of vendors already(according to her). It feels like she doesnt want to work for her own money? I m kind of tired sending money back home too I mean $140 doesnt sound a lot but I have my own family now, and the fact that sometimes she would ask for extra. It just pisses me off because instead of using that money to my own kids ive got to send it to her, because she wont have money for food and all. And my mother like to blackmail her own damn kids too, saying shes just gonna kill herself so we try not to stress her out. She doesnt have any gambling drinking problems but so lazy to work for her own money. I want to stop sending money now, I just dont know,what to tell her.