Madjic
a side chapter with chelsea's mother doing "physical" tests with her grandchildren might be good. She can measure and compare their sizes, see if they can get hard and c*m, and she can measure their stamina with a milk machine or something like that till they go limp. After that, she could send the results to Chelsea with the excuse of "what better subject than your daughters?". Please, don't make them have the same statistics.