Although the 18-year-old 'Keeping Up with the Kardashians' star has not shared much with her sisters about her brewing romance with the singer, reported Hollywood Life.
"They're in that stage where they're obsessed with each other and talk 30 times a day. She doesn't tell her sisters much about the relationship, but she's excited because she really likes Harry. It's young love!," a source said.
Jenner has reportedly invited the One Direction singer to spend Christmas with her family at her father Bruce Jenner's Malibu mansion.