You decide to enact the plan when she bathes after dinner. But earlier on, you sabotage the bathroom door so that it couldn't be locked properly and then greases the door to ensure that it will not squeak.
After dinner, you offer for her to go bath first with the excuse that you would clear the dishes. You clear the dishes, wait until a few minutes before entering. Inside the room, you look at the basket hamper near the wall and then the partition dividing the room with the actual bath area and see the outline of Rumi, sitting on a stool, her back turned to you as she washes her body. Meanwhile, the sound of hot water filling the bathtub masks any sound you made, and she hasn't realized that you're just two meters away from her. You shut the door behind you as stealthily as possible.
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