I found one Hilda might enjoy if she plays computer games:
Angel's Awakening
Angel’s Awakening is an Interactive Erotic Story about the Sexual Awakening of a shy, reserved young librarian in the 1940s. Follow Angel and Detective Malone in their classic NOIR tale, as they search for Angel’s missing best friend. To find Angel’s friend, she must go places she would not normally go, and do naughty things she would not ordinarily do. To her surprise, she finds pure joy and happiness in letting go of her strict morals and participating in increasingly intense sexual activities.
Angel’s Awakening takes Erotic Interactive Fiction to the next level with true, full-Realtime 3D graphics and complete, top-quality voice acting throughout. You control the visual style, set the scene, and control the action during 16 increasingly intense sexual activities.
This Erotic NOIR story features mobsters, voyeurs, and even a secret society of the rich and powerful, whose primary activities are decadent orgies. Follow Angel’s story as she progresses from a hesitant but willing participant in an “Oral” experience with a mobster in an underground casino, to an incredible Five-On-One sexual encounter in front of an entire group of spectators at a decadent Orgy Festival.