my mom remarried when i was 4 immediately after leaving my dad, ended up having my sister when i was 7 and basically from that point on I became a live in baby sitter. never experienced sleep overs, or after school activities because i had to rush home to watch the kids. she had my brother when I was 9, another sister at 11, another when i was 14 and lastly another sister at 17. my step dad and her both left me in charge my entire life. never was allowed to hangout with friends, the boyfriend experience was non existent no one wanted a girlfriend that couldn't go anywhere ever. couldn't go to tutoring, never had a job until I was 18 because I had to"pay my keep"aka watching them. along with maintaining the house, dinner etc that was my entire childhood. she planned on divorcing my step dad for a new man and sadly my step dad passed away last year anyways ,and I moved in with my mom to help with my siblings once again along with my infant son. we had an agreement she would watch my son so I could work and continue my education. i was 21. well that never happened she did a complete 360 and started going out, meeting new guys. she has never watched my son. not once, she never asked and when I would need to go to work I couldn't rely on her anyways. my SO ended up moving in with us to help we got back together during this and she continued with her same behavior. never was home she went to work, went out, even stayed with a boyfriend leaving us in charge of a 14,12,10,7,4 year old including our 6 month old son. every time I threatened to leave she got offensive saying I was leaving her high and dry after we "lived for free". I would feel guilty my SO and i fought so much over this but him wanting to be with his son he stayed. caused a lot of problems, still causing problems. we ended up moving out and are expecting our 2nd baby late July. And we are currently spending time with his parents till we move to a new city and start over fresh, and my family over there wants to help us with our kiddos so we can finish our college courses. they also feel guilty because they convinced me to move in with her not knowing she would change so drastically. now my mother is sending my 4 year old sister to my grandparents because "she has no one to watch her" so now she is sending her responsibility to with us yet again. she's also telling me she has no one to watch my sister tomorrow and wants me to watch her all week, yet again. I'm just so tired of her putting her load on my back. I'm 6 months pregnant with a 16 month old. I do not have the energy to watch my 4 year old sister. plus my mother has her completely spoiled she gave me HELL last week, refused to eat, sleep on time, screaming, disrespecting my in-laws. my SO and his parents agree that i am enabling her. i need advice on how to tell her I'm not watching my sister and to figure it outon her own for ONCE in her life. without sounding so vicious. plus I just really need to vent😬