They spent the morning wandering through boutiques in SoHo. Trish played the role perfectly, attentive and interested, full of suggestions and compliments. She steered Prue toward expensive stores, watched her balk at the price tags, then insisted on treating her to things.

“Consider it a wedding gift,” Trish said, holding up a designer maternity dress that cost more than Prue probably spent on clothes in a year. “You’ll need something nice for when Nate takes you to ...