Is Heidi in on money-making scheme to sell sex tapes with Spencer?

[HMG] – The case of Heidi Montag and her ‘unauthorized’ sex tape is getting thinner by the day — Heidi has admitted to friends that at least one exists, but she’s also talking to Vivid about making a deal – And she and Spencer Pratt are clearly plotting the whole sordid scheme.

Heidi met Spencer in Costa Rica over the weekend, allegedly to collect two of her dogs before the oncoming ‘divorce.’ And her husband has [supposedly] delivered a bleak ultimatum — Call off the divorce and do a reality show together, or he’ll unleash all the sex tapes.

But the two were caught on video, behaving nothing like the cold, distant strangers you’d expect from two people on the brink of divorce.

And this is making many people suspect Heidi’s ‘distress’ over the tapes is just another insulting publicity stunt.

It gets worse: This is the second time in two weeks the pair have secretly met in the tropical haven — they were also spied there on August 18.

To add fuel to the flames of suspicion, Heidi has now asked for a meeting with Steve Hirsch — the boss of Vivid Entertainment, who released Kim Kardashian’s infamous tape.

Steve is due to fly down to Costa Rica next week to discuss a deal for her tapes, which include girl-on-girl action with Playboy’s Karissa Shannon.  And TMZ says Heidi wants him to bring the sales numbers for Kim’s tape so they can work out a “back-end deal” for more money if Steve can’t offer her enough cash up front.

Kim got $5-million for her tape after promoting it heavily by threatening a lawsuit that never emerged. Could Heidi and Spencer be seeking a similar payday?

Something tells me we’ll soon get to find out…