About this scene
Holiday season, store still has the wreath display up, end of aisle still has the lights on a timer. She grabs his hand somewhere near the gift wrap and pulls him three aisles over to a section that's clearly emptier than the rest of the store. There's actual sex against the shelving. Her coat stays on. His does too. A shopping cart rolls past the end of the aisle exactly once and they both freeze for one breath, then keep going. The whole thing takes under four minutes from grab to leave.
What to watch for
The cart rolling past is the highlight. You can hear it before you see it. They both stop, hold position, and listen. He doesn't pull out. She doesn't move. They wait until the cart is two aisles away and then she nods once and they keep going at the same pace. That moment of holding still is more telling than the rest of the clip combined. They've been in this exact situation before. The recovery time is what gives them away.