Sophie Kinsella's "Shopaholic & Sister".
What's a round-the-world honeymoon if you can't buy the odd souvenir to ship home? Like the twenty silk dressing gowns Becky Bloomwood found in Hong Kong... the hand-carved dining table from Sri Lanka... the, um, huge wooden giraffes from Malawi (that her husband Luke expressly forbade her to buy)...
Only now Becky and Luke have returned home to London and Luke is furious. Two truckloads of those souvenirs have cluttered up their loft, and the bills for them are outrageous. Becky's feeling rather blue - when her parents deliver some incredible news. She has a long-lost sister! Becky is thrilled! She's convinced her sister will be a true soulmate. They'll go shopping together, have manicures together... Until she meets Jessica for the first time and gets the shock of her life. Surely Becky Bloomwood's sister can't... hate shopping?
Confessions of a Shopaholic
Shopaholic Takes Manhattan
Shopaholic Ties the Knot
Shopaholic & Baby