What a selfless son you are!
Giving money and help to Mom, while your own roof is leaking, you cannot pay your electrical bill, your water is polluted, your boiler is on the fritz, your kids cannot afford to see a doctor, you cannot afford to buy the medicine you need, you can only afford to eat McDonalds and Doritos, your car is broken down, your house is overrun by rats, and you and your family are forced to live in a tent in your backyard.
You could fix all these things if you wanted, but no - you are putting Mom first!