We report Electron Paramagnetic Resonance (EPR) studies on intercalation ferromagnets Mn0.79PS3(4,4'-bipy)(0.42) and M0.84PS3(1,10-phen)(0.64) and their antiferromagnetic host MnPS3, in the temperature range 300-15 K. The nature of the organic guest cation appears to have a strong influence on the magnetic behaviour of this inorganic-organic hybrid system. The continued appearance of the exchange-narrowed sharp line, characteristic of the paramagnetic phase, even at 15 K suggests that the hulk of the intercalate ferromagnets in this system do not attain a completely ordered state.