My sister is 18 and not to long ago had a kid. She is a very cute kid and I love her. The kid is only 5 months old and is learning to crawl now. My sister had this kid with her now Ex who was a very nice guy also 18. He LOVED his kid and loved my sister. My sister would always boss him around she was always rude to him she never wanted to change diapers and would constantly just wanna go do whatever she wanted. She lives at home thankfully so my mom is able to help her a lot. My sister sadly does not see it as help and instead sees it as a way she can go do whatever she wants while someone else takes care of the baby.

It was annoying my sister never took my moms advice and would always tell my mom that "I know what I'm doing you did it when you were 18" which my mom did take care of me at 18. But my mom also lived in military housing and we had a lot of stuff to help us. My mom is always trying to help her and be there for her but my sister just refuses and is incredibly mean to my mom for no reason other then she feels like she is "always getting bitched at".

I tried to talk to her and maybe try and see what was up. Sadly though my sister has kinda always been this way. Making poor choices and never wanting to take responsibility for her actions. It finally all came to a horrific event happening about 2 weeks ago. My sister decided to take a trip to a beach in Texas and didn't let anyone know until 3 days before she left for it. Her plan was to drop her kid off at her dads and have him watch her. Her dad was sick however with strep throat. To which she told me "Which is stupid cause she is already sick and babies can't get strep throat anyway".

I was in such shock by the fact she not only wants to leave the kid with someone while the kid is sick but also she thinks the kid is immune to strep throat. She then explained her plan to just leave her at her friends house and also it's two days before the trip and my mom does not know yet. I left before mom got home and when I went up there the next day my mom had the kid my sister was gone and some of my mom alcohol was also gone. My mom said she told my sister she'll watch the kid and that she had to let my sister leave cause otherwise she may have tried to take the kid to her friends house who has never taken care of a kid before.

My sister later that day asked me for gas money. When I said no she then asked me to ask my grandma for money and send it to her. When I asked why she doesn't ask she said "You're the favorite". Now I will admit I am the favorite but that is only because I don't do stuff like that. I did not respond as I was to upset about the fact her plan was to beg me for gas money. I then asked why didn't she plan for this? Her response was that she was going to door dash while in Texas. I just told my mom what was happening and she gave her a little bit of gas money and was PISSED. She went to go see some family that day and they were also mad at my sisters choice.

The worst part was that our father didn't know. Cause my sister didn't wanna get on trouble and tell him cause she took her car which was horribly unreliable on an over 14 hour trip. When she got back she got into a fight with a bunch of the family and said "I really don't see how this is a big deal"

Can anyone please give me some advice on what do to. Is there something I can say to her? Something I can do to just help her out? Please.