Designer Trunk Show

   Kelly Wearstler, an interior and fashion designer, will have a trunk show on Saturday at 4 p.m. at MONC XIII on Madison Street in Sag Harbor, with cocktails and a book signing from 6 to 9 p.m.
   MONC XIII is a high-end furniture and home goods shop owned and operated by Natasha Esch, an interior designer and former president of Wilhelmina Models.