My dominant fling

Beth has plenty of friends but when a tragedy happens and she isolates herself, she meet Zander. A quiet and mercurial guy she finds comfort in him...also in his body. The two begins relationship with no strings and no feelings, choosing to push those aside and search each other solely for s****l purposes. Will one of them gain feelings? What will happen if when one finally finds a solid relationship? Can they keep a friendship outside of their s****l relationship?