Mulberry Island is an island located near Springfield.
Lisa and Nick decided to have their first kiss under a mulberry tree on Mulberry Island. Abe took them there, but was stopped by police in the middle of the way. While they travel to the island, Lisa realizes that Nick isn't as adventurous as he seemed to be. She was going to kiss him when she saw Hadley Richardson and Pauline Pfeiffer in her vision who warned her before writers that are "lousy lovers". Meanwhile, Marge arrived to the island. Nick told Lisa that he couldn't do it anymore, and left. Marge then kissed Lisa on her forehead and they both left the island together.