Thanks you right

I’m only 25 I moved out last year and got this job and I told them I’d help out , this year covid hit me and I lost the extra income I would use for my personal needs like food and rent but they still kinda expected the same about of money as last year and at one point my mom told me to buy less food things for home cause I should be dieting anyway .. so it’s been a stress and I recently heard that they want my brother to take out a alone to pay off the house mortgage which sent me in a panic because I don’t want him to take out any loans ... I just don’t know how to tell them i can’t do this forever without them holding a grudge and hating me