A clear boundary can make the time you do share more relaxed.

Without a stated limit, both people spend the visit negotiating silently: one wondering when it ends, the other wondering whether to ask for more. That quiet hum takes up a good share of the time it was meant to protect. A clear edge, an hour, this evening only, home by nine, takes the question out of the room and lets whatever time exists be properly used. Limits are often what make generosity possible.

Say the shape when you arrange something: I have two hours and they are yours. Then be fully there inside it, and leave when you said you would.