I'd wake up every morning with her in my arms. It would still probably be quite some time before she herself would wake up, but if I couldn't get back to sleep I would be more than content to lay there for hours holding her close, basking in the radiance of the morning sun reflecting off her skin. I wouldn't dare disturb such beauty.
I'd help her prepare in the morning, making sure to address her respectfully, and keeping vigilance so that she doesn't misplace any important articles of clothing. I would escort her to the dining hall for breakfast, hopefully being allowed to eat with her and enjoy each other's company before the day got underway. Given her occupation we'd probably have to separate for some time, so I would volunteer and help do whatever needs to be done around the base. She has her own duties to attend to, so I wouldn't be too clingy at this part of the day, but i'd take every opportunity to assist her if need be. I want to help the best I can, to validate my place in her heart to the best of my ability.
I would probably be worried sick every time there was an alert and she got sortied... but she's the best of the best, and my faith in her is strong. I'd be on the runway every time she returned, to embrace her and stare into her smiling face.
As things wound down at night, I'd love to just be able to relax with her around the base, attending to her needs to loosen up the stress of the day. She's a very easygoing person, but I imagine everything still builds on you after awhile. We'd eat, talk, find entertaining things to do, maybe play a prank on Barkhorn if things got too quiet.
Every once in awhile, we'd sneak off to the shoreline or the garden and lay side by side under the night sky, by ourselves. Usually we'd just retreat to her room, enjoy the privacy and let the day draw to a close. Invariably, the day would end with us fast asleep, in each other's arms.
Hopefully one day the world would return to peace, and we could rebuild Karlsland together. It would be a tremendous undertaking, but I know that nothing would make her happier.
When all is said and done, we'd get a comfy home in southern Karlsland, where she grew up, and spend the rest of eternity together - visiting old friends, exploring the new world, and often just enjoying the quiet life.
I myself never really desired to have children, but if she wanted them I would be absolutely honored and delighted to father them. She might seem a bit childish on the surface, but I have no doubt in my mind that Erica would be a perfect mother if she wanted to be one. She would be playful, caring, and understand a child's mindset perfectly. I would shape myself up to be the best father I could be. Children are entirely her decision.
Through it all, I don't think anything could ever contest with the pure magical sensation of witnessing her bright, beaming, carefree, smiling face every morning.