Murder, with peacocks / Donna Andrews.

Enhanced descriptions from Syndetics:

Agatha Award Winner for Best First Novel

Three Weddings...And a Murder

So far Meg Langslow's summer is not going swimmingly. Down in her small Virginia hometown, she's maid of honor at the nuptials of three loved ones--each of whom has dumped the planning in her capable hands. One bride is set on including a Native American herbal purification ceremony, while another wants live peacocks on the lawn. Only help from the town's drop-dead gorgeous hunk, disappointingly rumored to be gay, keeps Meg afloat in a sea of dotty relatives and outrageous neighbors.

And, in whirl of summer parties and picnics, Southern hospitality is strained to the limit by an offensive newcomer who hints at skeletons in the guests' closets. But it seems this lady has offended one too many when she's found dead in suspicious circumstances, followed by a string of accidents--some fatal. Soon, level-headed Meg's to-do list extends from flower arrangements and bridal registries to catching a killer--before the next catered event is her own funeral...