Casey Affleck, 46, packs on the PDA with girlfriend Caylee Cowan, 23, as she gives him a kiss

Marnie Simpson 'falls out' with Casey Johnson's brother Chet for a second time

Casey Affleck, 46, cuddles bikini-clad Caylee Cowan, 23, in Tulum amid rumors of engagement

Casey Affleck packs on PDA once again with rumored fiancée Caylee Cowan during lunch date in LA