Jon & Kate Splitting?

(CBS) Jon and Kate Gosselin have a major announcement in store for fans of their white-hot reality show, "Jon & Kate Plus Eight."

In a 30-second promo for a special, hour-long edition of the TLC show slated to run Monday, Kate says the two of them have made some "life-changing decisions" that will affect their famous family, adding she hopes the choices will "bring each of us some peace."

The TV spot, which first aired Wednesday night, flashed phrases such as "a family in turmoil" and "a relationship at a crossroads."

Given their recent track record, insiders say Jon and Kate's embattled ten-year marriage has finally reached the breaking point. TLC isn't revealing what the news will be, but there are reports it could be that the couple is separating or divorcing.

"Sources and family members have told us that Jon, for months now, has been living in the garage apartment, and that they were very interested in having separate lives," Us magazine Deputy News Editor Natalie Thomas told CBS News. " ... Now, sources are telling us ... he is looking for a new place and he will be moving out."

Monday's announcement would follow a string of tabloid rumors, some alleging infidelity by both Jon and Kate, rumors both deny.

But, with tensions running high, the marital strains have become all to clear to the millions of fans who tune in each week.

"They both seem pretty unhappy with the current situation," Thomas says. " ... I think it will actually, probably bring them peace and hopefully, the kids, as well, if they're not having Mommy and Daddy fighting so much any more."

But, with obligations for multiple future seasons, observers say viewers are sure to see more of them, even if it's no longer Jon AND Kate plus eight.