That is a very touching story. When humans learn to love an animal it opens something in their soul. To love a reptile has a touch more magic to it. Let your fiance know it's ok to mourn, cry, grieve. And after that consider another snake, separate housing this time. It takes time. Thanks to him for rescuing those two snakes and thanks to you for keeping their environment clean. Best of luck to Set, to adjust to the loss of her friend Kha.