Complex sentence: Lily pays him $100 to make sure she always has a drink in her hand during the entire weekend of Barney and Robin's wedding, although it is revealed in "Daisy" that these drinks are non-alcoholic as Lily is pregnant.
Split into simpler sentences: Lily pays him $100 to make sure she always has a drink in her hand during the weekend of Barney and Robin's wedding. It is revealed in "Daisy" that these drinks are non-alcoholic as Lily is pregnant.