Why did Rahel and Estha Break the Love Laws?

The ending of The God of Small Things left me speechless. Estha and Rahel breaking the love laws came as a shock to me. While it was foreshadowed in an earlier chapter when Rahel views Estha changing and taking a shower. I thought that chapter was just another example of how close the twins were, but it was actually foreshadowing what was to come. I believe that the twins break the love laws together because they have been broken by the society around them. The twins have quite the traumatic childhood and only they can truly relate to each other. The one's closest to them hold them in content for what they did to Sophie Mol. They are no longer seen as equals to their own family because their mother acted on true love. The twins are so tired of the societal constructs of who can or can not be loved that they give in. The twins are the only ones who truly understand each other and they do not want to deal with Baby Kochama's or anyone else's judgment. In conclusion, the breaking of the love laws is Estha and Rahel giving up trying to conform to the society that has broken them up over their lives.