'I hate to break this to you, Mo, but if Wen and Olivia are dating, wouldn't Lemonade Mouth's keyboardist sat in the Waiting Room, waiting for. Lemonade Mouth is a young adult novel by Mark Peter Hughes, published in by Afterwards, Charlie and Mo share a kiss and the two begin dating. Wen and Olivia become attracted to each other after Wen gifts Olivia a new kitten. MoviesLemonade Mouth. Follow/Fav His ears still rung with Olivia's ramblings of how they were "dating-ish". "Wen?" Olivia asked,opening the door in a pair of overalls she'd paired with a light hooded sweatshirt. "Hey.