This film's plot and structure are uncannily similar to Norma Shearer's Academy Award-winning The Divorcee (1930) -- however, Riptide (1934) was made just as the Production Code was coming into power, which resulted in a fatal absence of pre-Code sting, despite its libidinous, adulterous scenario. The film's only pre-Code remnant is Shearer's revealing, bosomy evening gown, under which she wore no bra.
Well, Mary, if he won't believe you, why should he take me for a Gideon Bible? I don't look like one, do I?
After Mary kisses Pamela for daddy, the book laying on the bed disappears in the next shot.