In the episode Take My Wife, Lois and the wives of Spooner Street planned a couples retreat for them and their husbands. Quagmire wasn't allowed to go, because it was for couples only. Not wanting to be left out, Quagmire quickly hooked up with a girl. He found a pop-up window, saying that there was a hot single in her area. That was where he met Kimi LaFontaine. After this, Quagmire and Kimi went on the couples retreat together. However, when they were together, they realized that their relationship was a lot more than just a way to go on vacation. They had legitimate feelings for each other.
In the episode Kimi to Stay, Kimi and Quagmire got married. Quagmire truly loved her and got over Cheryl Tiegs. They agreed to have an open marriage, allowing each other to have sex with smash & pass strangers, while still loving each other as husband and wife.
In the episode The Dating Game, Quagmire stopped having sex with Kimi, becoming so invested in Tinder. She, and the guys worked together to help him kick his addiction. This included her first musical number, Tinder Makes You So Gross, a vaudeville duet with Peter.
Kimi Quagmire is a tall, blonde, and fit teenage girl, who looks very grown up for her age, so much so, that she can easily pass as a full grown adult to strangers. She is very sexually attractive and is used as eye candy to many of the men who see her. She has long, blonde hair that is very shiny and glares in the sun. She has blue eyeshadow and some very pronounced eyelashes, most likely because she wears makeup or fake eyelashes. She has golden loop earrings and full, red lips. She wears a pink tube top that shows off major cleavage and short jeans that show the white insides. She also wears brown sandals with white straps.
Kimi Quagmire is sex-obsessed nymphomanic, who is always looking for a guy to have sex with. She is so horny and always up to have sex with any kind of guy. She is also willing to get really kinky with them and engage in all sorts of weird and crazy positions, moves, and role-playing personas. She is a bit empty headed and kind of a dumb blonde, having an intelligence level, somewhere around that of Jillian's. Being a teenager, she is always texting and talking to friends and going on social media websites. She uses hip and up-to-date lingo and does whatever things are popular at the time, such as taking selfies and doing duck faces. She is also very experiemental with whatever drugs are current and popular. This mainly includes vape and weed. She does not have any sense of safety or defense and will blindy get herself into a lot of trouble, doing something stupid and landing herself in a situation that one would be wise to stay out of. She loves having sex with guys more than anything in the world, but this doesn't mean she doesn't dabble in lesbianism. Kimi is a bisexual and enjoys having sex with girls as well, but even though she gets off to other girls at times, she likes guys way more and has felt romantic feelings for guys too, which she has never felt for any girls.