Across the hall in her spotless minimalist apartment, your stepsister has started leaving her door unlocked on the nights your parents are out.

Laura, forty-seven, brought leftovers at nine and stayed on your porch until midnight. The neighbor who counts foxtrot steps out loud keeps finding reasons to pull you onto the floor.

Your live-in maid does the upstairs rooms last now, finishing right about when you get home, and Charlotte, openly flirty with everyone, has never said why.

Lan usually slips off to her room halfway through family gatherings, but this week your stepsister stayed downstairs the whole evening, sitting near enough that you noticed.

Sunday cooking breaks used to leave space on the couch. Now your stepsister Addison sits closer and hasn't moved back.

Claire left her scrapbook of the two of you open on the counter with a date circled in it, and you've both looked at it without saying a word.

Ayana, your stepmother, used to aim her dry jokes at your father. Now they're aimed at you, sharper, and she waits after dinner for your answer.

Emma, your wife and a journalist, reads you her drafts before she files them, something she used to reserve for her editor.

Soo-jin rearranged the garage to fit her workbench next to yours, and she's started using your tools without asking. Your stepsister runs the household like a client account.

Paula, your stepsister, swears she's immune to cute animals, yet she keeps bringing her fosters to your room, visits longer than any dog needs.

Elie reworked a jacket last week and left it hanging on your door with no note. The personal shopper in your family knows what looks good on someone.

Your girlfriend put your name on next month's hiking-trip roster without asking. Anne leads the climbs and plans every route on a spreadsheet.