MY Rarest Days of all

I Have posted atleast twice on this website and I have told complete internet strangers my my deepest darkest thoughts  that I havent even told my friends and I feel comfortable  posting even when I am rarely happy

Today I was excited for the walking dead Tv show to come back on the zombies calm me for some weird reason but anyway I watch my baby nephew for 12 hours 6 days a week and i get paid 150 every two weeks for watching him on top of that since i have no job I am expected to cook and clean the home at the end of the day there is so much more to do but i am exhausted today i had a little bit more energy because of the Tv show but even on the rarest happy day I get hit . My nephew’s mother is young (is my age, 22) and she is struggling because my brother just wont help her.Today she picked him up as usual my mom had a short conversation about the baby and she left today My sister was on facebook and sees the my nephew’s mother talking about me behind my back and how I don’t feed him properly, Talking about my appearance, and etc. I dont know what to say to her about this because I feed him on time and I try to give new foods that he can chew, I play with when I am not cooking or cleaning I try to keep him clean but he is a baby. I’m not trying to bad mouth her because she is a first time mother but she has told me she leaves him in his room in his playpen crying and closes the door, he comes over smelling not of baby scent but of old milk, womens perfume, and cigarettes. Again my introverted personality hinders my ability to say anything to her I cant watch the baby anymore its too much work load for how much i’m gettin paid and i feel like im getting taken advantage of again, the way they sound almost they are doing me the favor

I am I overreacting? I really dont know.