What could cause two partners to act like that?
It is possible to understand this behavior, seeing as one coalition party's support rating has plummeted, while desperate attempts to conjure a rise out of it have been met with lukewarm reactions at best. I'm talking about that so-called core text that talks of masters, servants, horehounds, stagnation engine – not brakes, an engine – and innovative barn swallows.
Of course no one can take that seriously. So next you try something desperate. Pure replacement activity. I agree with Jürgen Ligi when he says that national finance and social policy is far more complicated that busying oneself with replacement activities.
You said that IRL and SDE are looking for replacement activities. Prime Minister Taavi Rõivas has done nothing wrong in terms of these relationships ending up where they have?
Arguments, and eventual divorce, are never one-sided things. Good relationships need daily work from everyone involved. Apparently something has been left undone.
Looking from far away in Brussels, I see that IRL has been given quite a lot: the president is a former member, the European Court of Auditors got an IRL member etc. We cannot say the Reform Party has been unjustly miserly and ignored its partners as the majority member. It also seems to me that the policies of SDE and IRL have been realized to a far greater degree than those of the Reform Party. It seems to me that our partners have not given this fact the credit it deserves.