Heat is a constant companion for most mares, but after a certain age, that companion fades and stops visiting quite so regularity.

Twilight Velvet thought her days under that yoke, only to be proven wrong time and again. While Night Light is still the love of her life, his own age had robbed him of a lot of his drive, forcing her to seek out the companionship of a good friend; Princess Celestia.

Now, on the eve of what surely must be her last heat, she seeks out her friend, only to find she's not alone.