Am I a bad sister..?

My older sister is having her second child today and I'm not even allowed at the hospital or around even after she has my niece today... 
A few months ago we got into it bcc I told her she needed to straighten her sh*t up bcc she lives with my father and is treated like a princess, is married but separated, slept with my husbands bestfriend at my wedding and got pregnant while still married to her husband, has been with multiple guys since getting pregnant and can't stand my husband bcc we have done everything by the book with no help from my father or any other family... 
We fought bcc I told her she should punish her 1 years old for calling people names... Not like poopy head and names like that... I'm talking jack*ss, c*unt, b*tch... She said she's proud of her kid (which is understandable in normal situations) and is raising her to be a free spirit with no bounds and proudly TAUGHT her child to say these things to adults... And I remember times when we were younger that we got spanked, put in timeout and grounded for cussing by my father and yet she is also allowing it... 
Since that day we haven't spoken and I haven't seen my niece... I've also been told I'm not allowed to know any details about the birth what so ever... 
So am I a bad sister..? Should I feel guilty about expressing my concerns for my niece (bcc I already do) or should I just not have said anything about it and let it slide..? 
(I also have a 1 year old who is 6 months younger than my niece to the day...) 
Update----
 I understand that she's free to raise her children how she wants... Im just am trying to wrap my head around why it's fine for her to go around calling my husband a POS to complete strangers when her husband was on drugs during her first pregnancy and I was there to support her the hold time without judging her for staying with him... She also keeps telling me I need to leave my husband bcc he's 5 1/2 years older than me bcc she believes the women should be the older one in the relationship so she can control everyone yet we have been together for the last 4 years and she just recently started says these things since my father moved from a different state to 6 blocks away from me to be closer to his grand babies... Yet I see him once every 6 months and told to him just about as much... And he's 6 blocks away... I call and he don't answer or call back for days, sometimes even weeks but can post videos and pictures of his "fun weekend with his girls" and tag both my sisters in it and I'm not invited...
Update #2--- I don't want an "it's her child" speal bcc let's admit it everyone does it to each other whether they admit it or not... I just want the honest opinion of whether I should feel guilty for what I've done (and yes I deserve it)  or should I just suck it up and move on bcc at this point reconciling is out of thw question... There is no going back to what we had before...