Mom n Daughters Lunch n Chat

I'm so confused by this....the title is mom n daughters lunch....but what i see drawn is telling me a completely different story, almost "incest"ish,.....im not sure what to make of it. The captions dont really help either. Is there a previous panel/part to this comic? Because if not, its pretty confusing to understand whats going on. 
the art is nicely done though...i would have personally chosen something darker for the sky to allow the color of the shirt to pop out a bit more. But other than that its clean.