Depends on what type of lube we are using, but if it is an edible lube, yes.
However, I don't fantasize it's anyone else' cum. Knowing it's my own has just as much a humiliation kick, especially when combined with where and/or how she has me eat it.
Yes, she enjoys having me consume my cum whether it's from her pussy (my preference) or from wherever else she decides to have me ejaculate (i.e.: on her back, ass, stomach, thighs, feet, in her hand, a cup, on a brownie, slice of pizza, salad, etc.).