A Restaurent with Elderly In-Laws for Mother's Day in Newton
I don't think Lumiere is open for lunch. Use opentable.com to search the date. You can search the Western suburbs. Looks like Legal Seafood, the Met Club and the Capital Grill in Chestnut Hill are all open. Fiorella's is tasty enough, but it's not very 'special occasion'.
1293 Washington St., West Newton, MA 02465
187 North St, Newtonville, MA 02460
it may be too late but you could try lumiere for upscale, fiorella for family-friendly italian, aquitaine for bistro-style french, or even legal's seafood which will serve a good piece of fresh fish. i believe any of these would be comfortable for and attentive to an elderly patron.