This is actually a very involved and good fic...
Don't let the warnings in the chapter mislead you. First, the BSDM is only one chapter and it is in reference to something Brian gets into as a form of "pain management". It makes sense in the realm of the fic. Actually, it kinda makes sense even from a cannon standpoint. It is even possible to see the character of Brian doing this. Second of all, the children are not biologically Brian's or Justin's. They are all relatives' children that for various reasons Brian and Justin take in at the end of the fic. The fic is more about an evolution of the characters. You know how that whole C/L group screwed up the last season by not wanting B/J to be in a relationship. There is also resolution to things like Brian's relationship with Joan. There is some dimensionality brought to Joan. Brian forms a relationship with her, that while never the traditional mother/son relationship, is based on some understanding. The rape mentioned in the fic, has more to do with Brian's sister than with him.
Lindsey has to deal with her unresolved feelings for Brian. That is done in a realistic way. Brian decides that he wants to be more involved in Gus' life in a realistic way. Realistic in the sense that you could see his character doing this in a cannon perspective if the series went on for a few more years.
This is actually a good alternate universe fic that veers from cannon at the beginning of season 3. It is a very interesting take on things. Also, Brian and Justin are far from the domesticated dads that you see in bad fic writing. Justin does eventually want to have children, but so far those children are young and have very little to do with the story.
I know you guys make fun of a lot of fics, but this fic is by no means bad fanfic. The warnings are misleading and the characters are quite interesting. It is a well written story with a great deal of cliffhangers, humor, angst, and TEH love that you all talk about all of the time.
I am just saying that you may want to give it chance. If you don't want to give it a chance, please do not rip it apart. The author doesn't deserve that. The warnings are misleading. It is not like most fics that have been written.