A quick little story.

Celestia and Luna have a long-standing tradition to 'relieve' their royal bodyguard for all the service and sacrifice that they have made for the crown.

Few ponies realize the danger these brave stallions put themselves through, and the shocking training and transformation that they undergo to protect the royal sisters from the dangers of Equestria. Only the largest, strongest and bravest stallions are chosen... and they then go through magical enhancements to make them even bigger, braver and bolder in all parts of their physique.

In exchange, once a month, the royal bodyguard platoon is invited to partake in a 2-hour 'stress relief' session in the Princesses' private quarters. Raven has never been a part of one of these sessions, though she has her suspicions as to what goes on in them.

But now, Celestia has invited Raven to attend this month's session! Surely Celestia must realize that Raven isn't interested in 'those kind of things'? Raven had long ago decided to forsake any of those sorts of behaviours and drives in her push to be the ultimate royal secretary.

Just what does Celestia have in mind?

Warning, contains: Magic job (mare on stallion) / Big penis