Kate looked down uncertainly at the slight edge of piping she could see poking out from underneath the kitchen sink. M.T. stood by the back counter, her hands busy as she rifled through a large toolbox. “Do you even know what you’re looking for in there?” Penny asked, strolling into the room, a banana in one hand, and a bright pink bandana covering her head. M.T. shrugged. “No, not really.” She smiled. She couldn’t seem to stop smiling. She was still stuck in homebuyer’s euphoria. Penny chewed thoughtfully, her eyes going hesitantly toward Kate. “How about you? Do you see what the problem is over there?” She waved in the…