Hailey Bieber’s marriage to Justin Bieber is comparable to a full-time job.

The supermodel recently opened up to Harper’s BAZAAR about her marriage to the singer.

Hailey and Justin will celebrate their four-year wedding anniversary next month, but the past four years haven’t always been wedded bliss.

Both Hailey and Justin suffered major health scares this year.

“There’s a reason they say ‘for better or for worse.’ Like, that’s for real,” she said.

“I just think life is changing all the time. Day to day, week to week, year to year,” Hailey continued.

She explained that Justin is still the person she wants to come rushing back to.

“At the end of the day, like, he’s my best friend, but it still does take a lot of work to make it work.”

Things in their marriage will face even more obstacles when they begin adding kids into the mix.