momentary

Lasting for only a moment.

Happening at every moment; perpetual.

Ephemeral or relatively short-lived.

Yet oh! what an immense difference did I feel between this impression of a pleasure merely animal, and struck out of the collision of the sexes by a passive bodily effect, from that sweet fury, that rage of active delight which crowns the enjoyments of a mutual love-passion, where two hearts, tenderly and truly united, club to exalt the joy, and give it a spirit and soul that bids defiance to that end which mere momentary desires generally terminate in, when they die of a surfeit of satisfaction!

Tony's face expressed relief, and Nettie sat silent for a moment until the vicar said “It was a generous impulse, but it may have been a momentary one,[…].”