There is something that screams SO MARRIED when:
Grace is dragged up and down, east and west by Stratt and he's like "yeah, another tuesday"
How whenever she's about to do something questionable like kidnapping another scientist (Dr. Lokken) he's like "you'll get use to it."
How the movie pulls this but switched it, when Grace is firstly meets the crew and Yao says "he talks like a kid", and Stratt is like "you'll get use to it." Then followed by her telling him "you are doing great."
How once again when Stratt is about to do something questionable, like nuking the Antarctic and she says something like "I dont care about morality" and he's like "yeah, she doesn't".
And just the way they gravitated towards each other, she only smiles when he's with her, he goes to look for her whenever he feels uncomfortable in a room and after seeing people flirting. How they work together in separate stuff.
Ryland Grace literally said "I stand with my canceled wife".