Gigi Hadid And Boyfriend Zayn Malik On The Rocks

Less than a week after One Direction star Zayn Malik called model girlfriend Gigi Hadid his "everything," their relationship hit the skids with rumors swirling about Zayn's infidelity.

"Gigi's really invested in this relationship so she won't be throwing it away easily," the insider said. "But if he's embarrassed her in some way, she'll be out that door faster than you can say 'vogue.'"

The news comes after OK! reported last week that Gigi's BFF Kendall Jenner was caught texting Zayn. Does Zayn have a roving eye?

The source revealed, "Gigi’s really upset by the rumors about Zayn not being true to her."

"They’ve worked so hard to establish themselves as THE ‘it’ couple of the moment, so for it to all come unstuck now when things are starting to pay off is a real shame."

The source went on, "Zayn’s adamant he’s not been screwing around, but the rumors just won’t go away."