Estranged couple Heidi Montag and Spencer Pratt has officially cut off negotiations with Vivid Entertainment honcho Steven Hirsch telling him they are no longer interested in releasing any sex tape.

According to sources close to the couple, Spencer's rep shot a letter to Hirsch explaining that they won't release any tapes.

"Heidi's made it very clear that she is not interested in releasing any tapes," TMZ.com quoted a source as saying.

"It looks like she pulled the kill switch.

"Spencer's not interested in further destroying their relationship by pursuing an avenue she's so vehemently against," added the source.

Spencer's rep also told Hirsch that Pratt "thought 5 million dollars would be enough to convince her, but now [Heidi] is saying she'll bring out the legal team if he persists," added sources. (ANI)