Earlier this year, the 29-year-old "ME!" hitmaker confessed she had no plans to take her new record on tour, and later announced a string of whistle-stop stadium dates as part of various international festivals in 2020.
Speaking with host Zane Lowe at Beats 1 radio, the singer hinted her mum's cancer battle was behind her decision to scale down her touring plans for her latest LP.
"Change happens not only in my career, but in my life," Taylor said. "And I've got some pretty intense things happening with my family right now. I can't go on long tours and not have the ability to go home if I need to. I have priorities that aren't just touring now, and (the fans) have been really respectful of that in the past."
The "You Need to Calm Down" star added: "This is where the rubber meets the road and I actually have to make decisions. Where there are question marks in my life and things that are really important to me and my family, I have to be able to have some breathing room in my touring schedule and I think they kind of understand that."
Taylor's mum Andrea was first diagnosed with cancer in 2015, and earlier this year the star revealed that she's currently undergoing a relapse. She penned the song "Soon You'll Get Better", from "Lover", about her mum's heath scare.