Swift took Styles to spend time with her family and the three were pictured hanging out together, reported Aceshowbiz.
The 18-year-old British heartthrob reportedly stayed over at her Hollywood home. He was spotted going out with his girlfriend and her mother the next day and accompanying the ladies to do some shopping at Southern Californian grocery store Ralphs before returning to her house later in the day.
A day before, the couple spent some quality time without her parents. They were spotted visiting the Shamrock Tattoo Parlor where he got a new ink on his upper left arm.
Meanwhile, Styles introduced Taylor to his mother and stepfather after one of 1D's concerts at Madison Square Garden earlier this month.
"His parents had come to support him at the show, but they definitely spent time with the new couple. Taylor spent the early part of the night hanging with the parents, but once karaoke came on, she and Harry joined together up on stage for most of the night," a source had said.