Since Nip/Tuck is all about pushing the boundaries on their content into very uncomfortable areas, they are really trying to go for the "Daddy/Little School Girl" taboo, but with a fatal attraction type of twist. This is catering to a common male fantasy, but in order to make it palatable, Eden can in no way be seen as being seduced by Sean. Instead they make her into a sexual predator. Everything good in Nip/Tuck is in someway perverted and twisted, and it is no suprise that Eden is used as a device to corrupt Sean's daughter, who is what, 12 or 13? And the implication of Eden manipulation her into oral sex with a boy at school was vintage Nip/Tuck. The Parents Television Council is going to be all over this one.
The characters in this show always struggle with their basest, kinkiestdesires. There was no way the creator was going to skip this subject. Of course they had to go lolita. Nip/Tuck is, at its most simplistic, aperverted soap opera. Characters play themselves out and go away all the time, so it probably won't last that long.
I am curious, in your opinion, does the Eden story line suffer from bad development. ,or is it that it is just uncomfortable?