Heidi Klum has been rumored to be dating her bodyguard of four years, Martin Kristen, for about a month now. But, according to the model's ex-husband, she and Kristen have had a relationship for much longer than that.

In fact, Seal told TMZ his wife "fornicated with the help," and alluded to that being the grounds for the divorce.

So what's the deal? Well, Klum has been rumored to be dating Kristen since early August. But, then, Seal dropped this bombshell on his way out of an airport Friday evening.

TMZ cameras caught up with the Heidi Klum Goes for a Runsinger, and he surprisingly opened up about the end
of his marriage. Seal said, on camera, when asked about Klum's "new" relationship: "To be quite honest, if there is going to be somebody else in their lives, I'd much rather it was a familiar face. I guess the only thing I would have preferred is that. . . I guess I didn't expect any better from him, I would have preferred Heidi show a little bit more class and at least wait until we separated first before deciding to fornicate with the help, as it were," he said. "But I guess you now all have the answer that you've been looking for for the past seven months."

Right before that admission, the singer said: "Look boys, that's what happens when two people separate. They move on and that generally means [they have] other people in their lives. I necessarily don't expect to Heidi to all of a sudden become a nun, but as always, my main priority is the emotional well being of our children."

Rumors about Klum and Kristen's romantic relationship started when the model took her kids on vacation to Sardinia recently. Kristen was there too, and was seen playing with Klum's four children and at one point the blonde wrapped her arms around his neck in what seemed like a we're-more-than-colleagues manner.

So far, Klum has not commented on her ex-husband's allegations.

Read the full story at Zimbio!

See the video of Seal talking about Klum's alleged cheating here: