Celebrity Gossip's

Kiss legend Gene Simmons is furious over a sex tape that is circulating the internet, allegedly showing him having sex with a woman who is not his longtime partner Shannon Tweed.

Tweed and Simmons have been dating since 1985 and have two children together.

News of a sex tape could not only ruin his relationship with his longtime love but could destroy their family as well.

The video reportedly shows Gene (or at least someone who looks remarkably similar to the rockstar) partaking in sexual activities with a model named Elsa, who was hired to help promote Frank's Energy drink. Simmons is acting as spokesperson for the product and the two apparently met while working together.