I kinda wanted to bring Miranda Livingston (i.e. Sandy's mother) back into the limelight; especially since it's always been my intention to do more with her (as well as the parents of several of my other characters).
As for what's going on here, Sandy is wanting her mother's opinion on a rather "airy" top she has; and Miranda seems a bit surprised on just how "generous" her daughter's bustline appears to be (especially since Sandy doesn't usually show off that much cleavage in her wardrobe).
I wonder if Sandy is looking to get the attention of a possible beau; especially of the semi-aquatic mammal variety. X3