weak revenge
Kind of a weak revenge don't you guys think? The joke only last so long till Simon runs a DNA test on the baby, then he'll know for sure. And Robyn was gonna leave him anyway, so it would be an accidental fortune for Simon that it's not his baby (I know he still loves Robyn and blah blah, but just saying). Also with the hard evidence of the final gift (the CDs and stuff), there is no doubt Simon can launch a full investigation from cops that would lead to Gordo eventually, so there's no way for Gordo to get away with this.
All and all, a well-made movie, but the revenge isn't as masterful as the movie's tone set it to be.