Rita checks in on Leah after she's asleep. The teen seemed shy earlier and visibly reluctant to wear the diaper. But Rita knows how teens work. They're messy. And Leah is no exception. Rita can literally smell it.
Leah is asleep above the covers, her butt in the air, making her nightdress fall down, revealing her diaper. Said diaper is visibly used. Rita can see yellow and brown, and it's swelled up and sagging. But even if it wasn't on display or visibly dirty, it reeks, filling the room with a horrible stench. Rita walks up to her niece, planning on waking her, but Leah seems to be really enjoying her sleep.
Rita retreats and grabs the fully stocked diaper bag she picked up for this stay. She told Leah she wouldn't need diapers out in public, but she wanted to be prepared in case her niece had an accident. Rita returns to Leah's room.
Leah is sleeping incredibly deeply. She doesn't wake up while Rita clumsily removes the diaper, wipes her down, and tapes a fresh diaper on. Rita finishes and smiles proudly at her work. She doesn't want Leah to get a rash, so she'll check in the morning before Leah wakes up to see if she needs another change.
Rita throws the dirty diaper and wipes away, then goes to bed, setting herself an alarm to check on Leah in the morning.