Sam wasn't sure when she exactly fell head over heels for jack but she knew now as she laid in bed with him as he slept through another nightmare and she pet his head in attempt to calm him that she had fell completely head over heels for the ex-army the top of his head she turned to her side and closed her own eyes singing Pure Imagination from one of her favorite movies ever,Willy Wonka and The Chocolate Factory.
Thinking back as she pet his hair she couldn't help but realize how odd their situation was. Here she was,the sister of Donnie Darko one of the last people to truely make contact with "Grandma Death" laying next to Roberta Sparrows Nephew. Apparently from what she had found out when they had both jumped dimensions in some weird change of fates she had died so that he could try to save her by turning back the clocks and dying himself.
Feeling tears leaking from her eyes she shook her head refusing to think on when she was unsure of her feelings for the older she could never bring herself to think of his death. Instead she thought of their time here in this dimension to this day she was unsure if they were in heaven and they were finally able to had come first apparently a good couple months after her brother,Donnie and Frank her sister Elizabeth's boyfriend,had come to this dimension,and then not too long after she remembered wishing so hard on a star her heart would burst,jack came to her.
He had been skitsh even around her for the longest time and she found it had brought her great sadness and worked carefully to reintroduce him into the world that he had so long ago abandoned and of course was partially succefull but even to this day it was hard to keep him out in public for too long without him feeling took a decent amount of time though to get hugs from him and even now while they laid in bed together,fully clothed in their pjs,they had yet to kiss past a kiss on the cheek.
If she really had to pinpoint the exact moment she fell in love with Jack it would have to be when they were resting on the couch just watching tv with sam answering questions and bickering to her big brother that he needed to cook faster that she had looked up at the man and it if just looking at him while he was distracted by the tv,the pure wonderment in his eyes,and right after telling made-up stories for her late that night.
Even if it wasn't that she knew one thing through and loved jack and even though they had been brought together by horrible circumstances she was forever greatful. Feeling herself slip into sleep she let it come,she needed it now that he was calm.

On the opposite side of her his frame lifted lightly before bringing her small figure into his he kissed the top of her head
"My Princess..."he said sighing in pure content,not noticing that even in sleep her face lit up in pure happiness at such a simple nickname.