Thank-you so much everyone for taking the time to reply to my post/vent. I honestly did not mean to create such a stir here, I just needed (as one of the other posters suggested) a place to vent and get some things of my chest with other AP parents. I really did not mean to start an argument.
Now as for some of the things in my original post. First of all, I NEVER meant to offend any of the mothers (or fathers) who have placed their children in daycare . I understand that some people have to work and need childcare and daycare and such, and I have no issue whatsoever with daycare or people placing their children in childcare. My issue is with my cousin, choosing to return to work after only 7 days because thought that staying home all day was "boring" It is not a money issue with them. They own (free and clear) a house that cost close to a seven-figure price, a summer home, expensive cars, they are always traveling and they have a maid. So for them I know it is not a matter of money or a childcare issue. My cousin even told me that she doesn't know how I can stand being a SAHM because it is "boring" and she said they were considering hiring a nanny, but then she would still be around them all the time and never have any space. The kids (one week old at the time) were put in daycare for sometimes 10 hours a day. I offered to babysit, as my boys are older and would help me take care of them, or for the two of us to spend days together with all the kids, and that was when she made the comment about staying at home being boring. I just believe that those boys need their parents at such a young age (seven days old) especially their mother. I cannot understand parents wanting to be away from their children for more then half the day, especially when they are so young. they need to bond with their parents, and that no one is that important that they cannot choose to put off their work (if they have a choice like my cousin) for at least a little while
When we got the argument that ended with us not speaking anymore, it wasn't like I just kicked her out. They said they were leaving at the same time I asked them to leave. Thats the reason as I wrote it as me throwing her out/slash/her leaving. I had told her about the no hitting rule under or roof and her and her husband said too bad, that we cannot tell them how to parent just because they are out guests. When my DH said again that hitting is unacceptable she said "well then we are leaving" and I said something like "good because I am kicking you out"
For the crying it out

: I am 100% sure that they did not check on the twins during the night. My DH and I had given up our master bedroom for them, because it is bigger then each of our sons rooms, and we thought they would want to be close to the twins. They chose instead to place the twins one of my sons rooms (My sons were all sleeping the basement with two of my other cousins...whom they call their favorite uncles...kind of like a camp-out in the basement) The twins were in a room to the left of us, and they were crying all night, and from the room we were in we could see the doorway of the master bedroom when the door was open, and they did not come out once all night and the twins were crying so loud that they could be heard in the kitchen when my sons came up for drinks/snacks.
I did invite my cousin to get together (through my mother) soon after we fought, however my cousin said that she doesn't want to meet unless I first admit that her parenting methods are just as good as mine. When she was staying at my place before we got in the fight I asked her why she went so far from AP parenting and she said if she co-slept, and trying babywearing and other AP stuff then she did want the kids to become too attached to her because then when she wanted time to herself she didn't want to have to have two "high needs, co-dependent" babies. As far as I know her parents/husband are supportive. Her DH came to some of the LLL stuff, and said it was great, and her parents brought her a book on AP parenting stuff and told her that "breast is best" (her mother bf'ed her for almost 2 years) They all say that it is up to her how she mothers, and her DH told me they talked about it and that he supports the choices they made together.
Once again, thank-you for reading my posts and taking the time to reply. I am sorry if I offended anyone, and I did not mean to come across as rude or intolerant or ignorant, it was just that things like CIO and blanket training were such a shock to me, especially when my cousin was so receptive to AP parenting at first, and approached me and asked me all kinds of questions. I didn't meant to judge anyone else's parenting choices here, and I certainly did not want to start a fight or anything.