How much $$, to you, would be enough to care for a family member's newborn five days a week?

I’ve been babysitting my sister-in-law’s son, (Monday-Friday for six hours per day) since he was born, and the SIL pays me $50 a week, and less than that if she ends up keeping him at home for a day.

The going rate for in-home childcare is $175 and daycare is $200, a flat weekly fee, whether you keep your kid at home one day, or not.

I feel like I’m being taking advantage of, but she thinks $10 a day should be enough, since I’m family.

I especially feel taken advantage of, because she’s too stubborn to take some important advice I’ve given her, and keeps bringing the baby over, all gassy and/or constipated, so I have to “fix” him.

Anyone care to weigh in on this?