Complex sentence: With the help of his older brother Percy who provides him with a few nice outfits and money with which to wine and dine Mallory, Shaun is able to trick her into thinking that he is a rich real estate broker.
Split into simpler sentences: With the help of his older brother Percy, he provides him with a few nice outfits and money to wine and dine Mallory. With this help, Shaun is able to trick her into thinking that he is a rich real estate broker.