Does anyone else's mom always ask for money?

I'm at my witts end with my mom. I'm a sahm and although my husband makes good money, I don't think it's my place to just keep giving her money.

She only calls when she needs money. Never just to ask how am I or the kids or anything else.

It's hurtful. I've told her many times we have 2 car payments, my 7 year olds dad is refusing to pay his child support so all expenses for her falls on my husband, we have mortgage and a million other expenses just like every other family.

She does not work and gets money from my great grandfather weekly and sells her adderall for cash. She needed money today because she has to pay for a second drug test at the methadone clinic. I just don't understand how she keeps having the audacity to keep calling and asking me for money when I make it clear I don't generate income! (Yes...I know it's me and my husband's money but I don't think it's right of me to take from my family's budget and keep giving her money)

I'm just over it. I feel like I can't answer the phone anymore. It's beyond hurtful and I hate she puts me in a place to keep asking/ telling my husband she needs money.