Complex sentence: Tracy later steals a woman's pocketbook while she is distracted and the girls go on a shopping spree, whereafter Tracy and Evie become best friends and Evie moves into the Freeland household.
Split into simpler sentences: Tracy later steals a woman's pocketbook while she is distracted and the girls go on a shopping spree. After this incident, whereafter Tracy and Evie become best friends and Evie moves into the Freeland household.