Mystery Perennial ID: Daylily-Like Leaves, 3-Petal Pink Orchid Flower

Your daughter-in-law near Allentown, PA (Zone 6b) has a plant: daylily-like leaves, 3-petal pinkish-orchid flower with white stamens. Just emerged this spring. Need ID.

Key Questions for ID

• Native to area?
• Leaf length?
• Stem height?
• Flower size?
• Petal form: flat, reflexed (iris-like), or spreading?
• Solid pink or other colors?
• Flower diameter?
• Bloom period: spring or summer?

Likely Candidates

• Trillium — 3 petals, but leaves in whorl of 3, not daylily-like.
• Iris — 3 falls/3 standards, sword leaves.
• Spiderwort (Tradescantia) — 3 petals, grass-like leaves.
• Daylily sport — rare 3-petal mutation.

Reply with answers. Photos to acottagegarden@msn.com will nail it.