She doesn't notice it at first, Leela muses. But she guesses she should have known this would happen, seeing as Bender could never survive without Fry living with him. What genuinely suprises her is how casual he did it. Well, as casual as Bender can manage.
It starts with Bender coming over more often, which isn't that much of a change, he was already there often enough. But he also kept leaving stuff there. Photos, cigars, and hell, even some things he's stolen.
Leela also noticed that the closet in the hall was suddenly empty, and when she axed Fry about it, he said that Bender needed a place to crash for the night, so the two of them emptied it out, but ended up falling asleep on the couch instead.
That also started happening more, Bender sleeping over. For days at a time, even. She saw just how happy Fry was to have Bender around, though. So she decided what she had to do.
Bender was getting a beer from the fridge when Leela walked in, and she could hear Fry snoring in the living room. This had been the record of Bender staying over, going on almost a week now.
"So," She says, folding her arms, "How's the apartment?"
Bender flinches, and Leela hears a mumbled "shit!"
She smiles.
Bender stands, turning to face her, but never looks her in the eye.
"I- uh-" Leela hears the cogs in Benders head turn, quite literally, actually. She should tell the Professor to oil those on Monday.
"Tell me the truth, Bender." She says.
The robot stays silent, fiddling with the bottle in his hand.
"Bender…" She emphasizes.
"Aw hell…" He sets the bottle down on the counter, and leans against it. "I sold it…"
Leela looks at him for a few seconds, actually managing some eye contact briefly.
"Alright."
Bender sputters for a moment. "What?"
Leela just shrugs. "I said alright, that closet is all yours." She walks over, snatches the beer from the counter, and strides out of the room, stopping once she reaches the door. "But," she flicks the cap off the bottle, "if I wake up and find you in bed with us, I will kick your shiny metal ass into robot hell."
Not even a month later, she wakes up to Fry and Bender spooning, and just sighs and goes to get a beer.