Will Cong expel pro-Jagan MLAs and MPs now?

Now that as many as 15 Congress MLAs and two MPs have officially joined the YSR Congress party plenary, the question is what the Congress party would do now, at a time when the party is in deep turmoil over the Telangana issue.
These MLAs and MPs must have taken the membership in the YSR Congress; otherwise, they would not be eligible to be on the dais on the plenary and be part of the discussions on various issues and resolutions on them.
So, for all practical purposes, they have dumped the Congress and joined YSR Congress party.
Morally, these leaders would have to quit the Congress before taking membership in the YSR Congress. But they have not done on the pretext that they were all elected because of Y S Rajasekhara Reddy. Now, the ball is in the Congress court. Since they have openly jumped into the rival party, the Congress has to take disciplinary action by expelling them from the party.
The point is whether the Congress can dare do it at this juncture, when as many as 43 MLAs from Telangana region have already submitted their resignations and might insist on their acceptance. Similarly at the Centre, the party has already lost nine MPs, though they are technically still continuing. If the party expels or disqualifies 15 MLAs and two MPs, it will face serious troubles both in the state and the centre. And if it does not do it, it will lose its credibility!