Engaged sorority sister acting as though she is single at the bar

[James]

Pick one of the nighs where you guys are out . . and then have someone call the fiancee and invite him to meet you . . or better yet to give you guys a ride . . that way when he gets there he can see the way she acts . . .

A questions though. Shouldn't he realize she is like this? I mean thats an enormous misread for people about to be married.