Model Gigi Hadid is not as enthusiastic about her new romance as Zayn Malik, but wants to see what the future holds for them.
The former One Direction singer has been spotted on a string of dates with the 20-year-old model in recent weeks, and while he is said to be infatuated with her, she is reluctant to get into anything serious and even invited her sister on one of their nights out.
A source said: "Zayn is slightly besotted with Gigi. He's been the one heavily pursuing her, rather than the other way round.
"He thinks she's stunning and it wouldn't harm his profile to be dating a top US model as he launches his solo career.
"Gigi is slightly more ambivalent. She's aware of Zayn's bad-boy reputation, and is approaching with caution. She even invited her sister Bella on their date to The Nice Guy to encourage Zayn to behave himself."
According to the insider, one of the reasons why Gigi is hesitant about a relationship with Zayn - who ended his engagement to Perrie Edwards three months ago - is his recent twitter feud with her best friend Taylor Swift's boyfriend Calvin Harris.
However, she is willing to take things slowly and see if she and the singer have a future together.
The source told Britain's Grazia magazine: "Gigi has reservations about getting serious with Zayn. But at the moment they're just having fun and seeing where it goes."
The 20-year-old model - who recently split from Joe Jonas - is having a great time with Zayn, according to her mother Yolanda Foster.
She told Entertainment Tonight: "I haven't met him yet. Gigi's 20 years old, loving life, shopping like she should.
"I haven't met him yet, so I can't say anything about him."
Meanwhile, Gigi's friends are reportedly unhappy about her relationship with the 22-year-old singer.
A source said: "Her friends do not quite understand what the attraction is. He is not her usual type, he doesn't share her sense of humour or ease with people [and] he's a little more self-aware and awkward."
Gigi also recently took to Twitter to defend her relationship with the former boy band member.
In a post that has since been deleted, she is said to have wrote: "Sometimes life happens. For whatever reason in whatever timing. And sometimes it doesn't make sense till it does. That's it.
"If there was a real way to sit with each one of you and tell you my side of things, I would. But there's not, so I won't. I've found the only way to happiness is by living as though the microscope isn't there."
When one fan accused their relationship of being fake, she supposedly wrote back: "Who are you to say what is fake? Your comment proves my point exactly. If you don't know you don't know."