I have a lot of sources in your establishment too. And I can tell you with certainty that the military doesn't want to be involved here in terms of a marshal law or throwing out the PM. They know he's brought so much investment and they want that to continue. When the sanctions are applied and trade goes down the pipe.....the worst hit is first taken by the military. This time, if they do crap like before, not only will they get sanctioned, the growing Indian lobby will take that opportunity and literally trash whatever reputation Pakistan has left in the West. This would be it. You may not be able to import 9MM pistols, let alone advance weapons like the -16's and all.
Then, it'll be civil war as whoever doesn't win the next elections will come to streets and if the military takes over, the government parties will still come to the streets. NO military is capable of handing 2 or 5 million citizens out on the streets, people can pull soldiers out of their tanks and show them the power of democracy.
The overwhelming support from the Parliament has sent a strong message across the establishment that this time, any serious involvement in toppling the government might mean ACTUAL people on the streets (not 20K that IK brought, you are talking millions across the country). And the military also knows such involvement will sooner or later result in ANOTHER COAS sitting with Musharraf facing treason in the next few years. So they don't want it. They will however, ask the PM to work with them and let them have the powers they want like Afghan and India based foreign policy and weapons procurements, etc.
It'll be a compromise and the IK will get a boot out of both sides, the establishment and the political system