i feel like basically in an modern AU Harrow should always eschew seats/chairs/etc. in favor of Gideon's lap. But she should also look vaguely displeased about it.
They’d be that super weird couple always sitting in the conspicuously empty corner of some couch, you’re not sure what their deal is. They seem disconcertingly intimate but you’ve never even seen them smile at each other. Harrow is just always folded up in thirds, snug under Gideon’s arm, whole body framed by the triangle of Gideon’s crossed leg, ankle on knee. Sometimes Gideon has her hand fully in Harrow’s hair. Sometimes Harrow’s feet are tucked between Gideon’s thighs. Neither of them is ever looking at the other. Are they dating? Are they members of the same cult? Is this a vampire/thrall situation? You’re equally fascinated and unnerved.