You'll want Chapter 5. Spencer walks in on Carly, short beginning. STRONG SEXUAL CONTENT BETWEEN FAMILY MEMBERS. In other words, incest. This story is over, but there is a sequel titled "Yet Another iNcest"
iCarly - Rated: M - English - Romance/Family - Chapters: 6 - Words: 5,813 - Reviews: 86 - Favs: 136 - Follows: 59 - Updated: 10/13/2009 - Published: 8/16/2009 - [Carly S., Spencer S.] - Complete