"Foolishness in a Child's Heart" is the next sequel after "Resolve Never to Sin Again." Father Chris is getting further off the pious track because he can't counter his young parishioner Ellen. First, he meets her female lover Clara, which goes fairly well because Ellen is discreet about revealing her secrets about both of them. Immediately afterwards, she proposes a kinky role play game to him. He makes a half-hearted attempt to resist, but later that week they enact the whole scene exactly as she had planned it.