Is that enough?

No, make frequent spankings inevitable

Concerned that Trish might be sufficiently well behaved to avoid any further chastisement despite these extra rules, you add one more.

New Rule: Flaunting one's body and attempting to avoid exposure are both grounds for women undergoing a nudity punishment to receive further chastisement. As different people may have slightly different opinions as to what constitutes each of these offences, it is nearly impossible to avoid punishments completely. Women undergoing nudity punishments are fully aware that this is the case. However, the degree of chastisement should be proportional to the severity of the offence, so that most punishments for flaunting or bashfulness are fairly minor.

The spankings may not be too hard, but the reasons for them will no doubt prove to be highly shameful for the unfortunate young women suffering them.