Off topic but I need someone else's input.!

Ok so here's the deal I just started watching my boyfriends nephew who's 2 isn't potty trained and still drinks from a bottle keep in mind I'm 5 months pregnant and I have a 5 year old. last week I watched him for 3days and met her half way since we both live far and she wouldn't have to bring him all the way to me all 3 days. now the 3rd day I picked him up she gave him(her 2 year old) the money put him in my car and when I got home it was only 25.00 now I know for a fact daycare is way more then 25.00 for 3 days I feel like I'm being taken advantage of for one he's not potty trained and it's hard cuz I'm pregnant the reason I agreed was to help my boyfriends brother and her out! I understand it's hard but I feel like I'm saving them a lot of money by watching him when I could just get a job and make more and I deserve a little more then 25.00 for 3 days right.?Sometimes I have him for 5 to 9 hours a day while taking care of my 5 year old. So here's my question do you think me asking for 5.00/hour is too much or should I just be happy with whatever they give me.?