While introducing Lorelai to his sister's new baby, Luke shares a sweet moment with her. But when Christopher (recurring guest star DAVID SUTCLIFFE) witnesses the scene, he becomes concerned that Lorelai isn't fully committed to their marriage. Later, the two fight over whether or not they should exchange vows at the elaborate wedding party that Emily is hosting for them. And Luke and Christopher have an ugly confrontation on the streets of Stars Hollow. Meanwhile, upon discovering that Rory and Marty (recurring guest star WAYNE WILCOX) have been pretending that they just met, rather than admitting their previous friendship to Rory's friend Lucy (recurring guest star KRYSTEN RITTER), Logan reveals the truth to her. Also, Emily gives Lorelai a warning about her marriage. And Luke contacts a lawyer over his custody troubles with Anna (recurring guest star SHERILYN FENN).