He was generally displeased with the overreaching conduct of the Aetolians about the booty, and did not wish, now he had expelled Philip, to leave them masters of Greece.
Also he could ill brook their bragging, when he saw them claiming equal credit with the Romans for the victory and filling the whole of Greece with the story of their prowess.
In consequence he was somewhat brusque in his replies when he had interviews with them and kept silent about public affairs, carrying out his projects himself or with the aid of his friends.
While these stiff relations on both sides still continued there came a few days after the battle a legation from Philip composed of Demosthenes, Cycliades, and Limnaeus.
Flamininus, after conferring with them at some length in the presence of his military tribunes, granted Philip an armistice of fifteen days at once, and arranged to return with them to confer with Philip about the situation during the armistice.
As the interview had been conducted with perfect courtesy, the suspicions of Flamininus entertained by the Aetolians became twice as vehement.
For since by this time bribery and the notion that no one should do anything gratis were very prevalent in Greece, and so to speak quite current coin among the Aetolians, they could not believe that Flamininus's complete change of attitude towards Philip could have been brought about without a bribe, since they were ignorant of the Roman principles and practice in this matter, but judged from their own, and calculated that it was probable that Philip would offer a very large sum owing to his actual situation and Flamininus would not be able to resist the temptation.
Walbank Commentary