Mother and sons incest story

[RelentlessOnanism]

I'm looking for a story I read awhile ago. It's about a woman who works in a laboratory and she comes up with the formula for an incredibly powerful aphrodisiac. Somehow she and her two sons end up using it and she fucks them both. Eventually they decide the sex is too much fun, even without the aphrodisiac, and they start screwing on a regular basis.

Anyone know this story?