She does love attention and she certainly has proven to dress elaborately for occasions. Though getting huge expanders that would enable her to blow her boobs up to 20k would hardy make a 20% increase in size, I would love to see her do it. Bigger, higher, heavier, it would all make her physical movements much more indicative how huge her breasts are, the size weight, and position demanding attention, and moreover, requiring Foxy to make many more adaptions to compensate for their larger presence that now obfuscates much of her immediate surroundings by occupying so much of her line of sight.