Hi Oni Dorei,
I do know that - I have bought everything published so far.
Still it could work:
1). All the strips have been published on-line
and
2). They could always be sold wrapped in a "plain brown email" or something.
Seriously, if the stuff was sold discreetly through say MTJ Publishing by request I don't think it would have a negative impact on Yenny's character.
Obviously it's up to David.