It's pure determination that has Aeryn insisting they go back to the cabins from
Caritas, because John kept talking about going back to Meerkat and frell it, they're going back to Meerkat. She's okay enough to get them back to the cabin without a problem, but four drinks mean she still doesn't realize she's got an umbrella in her hair. That'll suck when she wakes up tomorrow with it stabbing her in the ear.
And for the record, she doesn't shove John out of bed. Even if it does seem a little small for all the space he insists on taking up.