After the man has yelled at, verbally abused, and threatened the girls with a gun, the young woman who was in love with him forgives him and rushes to have sex with him.
There are several implications that the young women/girls are attracted to the Corporal, and he starts to sleep with one of them who seems like a teenager.
Depends on your definition of cheating; Corporal John does keep several women hanging simultaneously, leaving them to believe he is in love with them all while also seeing others