The Bra Man Cometh

The call him the Bra Man. One look at a woman and he can tell exactly what size bra she should wear. He knows bra sizes better than the women who wear them. A young lady with extremely large breasts who has never found a comfortable bra comes to the Bra Man's store seeking his special sight. But he's not there and won't be back for days. How will she ever find the perfect bra? As luck would have it, the Bra Man's son is in the store.
He shares his father's gift, but with one notable difference. While his father does it by sight, his son does it by feel. Will the young lady allow him to fondle her breasts if it will lead to the bra of her dreams? And if she lets him go that far, how much farther will she be willing to go for a special discount?