Its title intentionally misleading, HIS LOVING DAUGHTER does feature a father and daughter as characters but never the twain shall get it on. Result is by-the-numbers porn revived on one of Alpha Blue Archives' "Young Lust" DVDs.
The father is good ole Daniel Harin, who made a mini-career of playing sexually active middle age guys, memorably in PROFESSOR OF SEX ED and THE DEBAUCHERS. I suspect it gave the older demographic of the adult movie theater audience somebody to identify with, but it's a bit disconcerting, sort of like Walter Huston getting the girl.
The daughter is an unidentified actress as Claudia, but it is actually the daughter's best friend Tina who has the hots for Claudia's daddy. Dolly Sharp also appears as a wealthy widow who gets it on with old Harin, who is her financial adviser. Continuing the "mature" theme, Harin has another client, a busty redhead played by Barbara Grumet, who gives both young girls a "sex education class" in lesbian lovemaking.
A cleanshaven, pre-DEEP THROAT Harry Reems makes one of his first feature-length XXX performances.
It's all slapdash and sloppy, with Claudia calling friend Tina by the name of "Rikki" in the final reel before reverting to her proper Tina moniker. At different times in the movie both Claudia and Harin literally wink at the audience in "Tom Jones" style breaking down of the fourth wall.