This is going to sound odd, but I just picture a conversation between this Tomoko and Yuu, where Yuu is worried about Tomoko because she hasn't groped her in months. Tomoko gives Yuu a BS response, while at the same time thinking, "Why would I want to grope you when I can grope Yuri and then some?"
Another thing I thought of was the other girls imagining living with Tomoko, and getting annoyed when she says, "I already made up my mind to move in with Yuri."