This fic is not like that at all. It is all about TEH love. Read my other comments in this post. The BSDM is only in one chapter and it is something stupid that Brian does while he is drunk and upset oversomething. It is something that you could see the character doing in cannon.
Also, the rape has more to do with Brian's sister then with him. You see a growth of all of the characters in the fic that were in cannon. It is a well written alternate universe fic.
Also, the children are not Brian and Justin's. They are not the result of MPREG. Brian and Justin get most of the children when they are teenagers and it doesn't happen until the end of the fic.
There are interesting takes on the Joan/Brian relationship, some growth on Michael and Lindsey's part. In fact this is not an anti-Michael fic at all. Some resolution to Chris Hobbs. However,the story centers on Brian and Justin's love for each other.
There is a lot of bad fic out there. However, I wouldn't put this story in that category by a long shot. Please do not rip this author a part unless you actually read the fic.