Yes, there are likely many out there. You can start by looking on popular fanfiction websites like Archive of Our Own. Just search for 'Jessie Luke and Jessie kiss' in the search bar, and you should be able to find relevant stories. However, the quality can vary greatly, so you might have to read through a few to find one that really suits your taste.
One possible plot could be that Jessie and Luke are friends who gradually develop deeper feelings for each other. They might go through some adventures together, face some challenges that bring them closer, and finally share a kiss in a moment of realization of their love. For example, they could be working on a project and start to notice little things about each other that they find endearing.
Jessie is an important character in Toy Story. She's a toy with a lot of energy and enthusiasm. She has a backstory about being abandoned and then finding a new family with the other toys.
Their relationship could develop through mutual support. Since they are having a baby together, they would need to be there for each other. For example, Luke could be there for Jessie during her morning sickness.
The relationship can be developed through shared goals. For example, if they both aim to capture a super - rare Pokemon, they could work closely together. Giovanni could provide Jessie with better resources and training, which would make Jessie more loyal to him. Another way is through a backstory. Maybe they both had a difficult childhood related to Pokemon, which could create a bond between them.
Well, they could have a wise old mentor figure. This person could be an older neighbor who has lived through a lot and gives them valuable advice when they face difficulties in their relationship or in their adventures.