Complex sentence: Bosch and her husband Justin had moved from South Africa to an expatriate community in Gaborone, Botswana, where they became friends with Ria Wolmarans and her husband Marthinus "Tienie" Wolmarans.
Split into simpler sentences: Bosch and her husband Justin had moved from South Africa to an expatriate community in Gaborone, Botswana. There, they became friends with Ria Wolmarans and her husband Marthinus "Tienie" Wolmarans.