What piano song was used in The Boondocks in the ep: Guess Hoe's Coming to Dinner?

There was this momentary part in the episode where Grandad mentions he
had relations with Crystal. Both Huey and Riley were engrossed by the
horrible thought of it. The last couple of lines were when Crystal
enters the scene asking him, "You ready to go shopping again?" Then
the song enters afterward. I tried using IMDb soundtracks, but to no
avail.