An interesting take on Montenegro, Prof D Lieven's - Towards the Flame Penguin 2015
From a despatch of Russia's Major General Potapov ... '(King) Nikita is shameless, his envoys usually liars, and the dominant characteristics of the Montenegrins are lying, breaking their word, laziness, self publicity, boasting, greed for money and arrogance', he also describes them as 'barbarous' and 'savages'. With allies like these who needs enemies LOL.
Well it sucked to be a Montenegrin King. Think it this way. You have been able to keep the Ottomans out for 200-300 years. Then the Serbs rebel, get autonomy. In roughly 100 years they are more powerful than you. And they claim you should be part of Serbia, and a big part of your population agrees. You cannot refuse to play along with Serbian irridentism, but you also cannot embrace it fully becasue "kaput" your state is dead. So you have to be a duplicitous bastard. No choice. The behaviour of Nicholas during the July Crisis (perfectly traced in Pointing's Thirteen Days) is an example of the impossible balance they had to do.