Claude’s Restaurant at the Southampton Inn (southamptoninn.com, 91 Hill Street, Southampton, 631-283-6500 ext. 538) celebrates Mother’s Day with a Brunch Buffet from 7 am to 3 pm. Adults are $40 each and children under 12 are $25 each. Dine indoors or outdoors, weather permitting, on the newly refurbished courtyard. Reservations are suggested.