Taking some time apart.Hailey Bieberis "emotionally exhausted" with husbandJustin Bieber's "ongoing stretch of erratic behavior," says a source — especially as she tries to focus on her $1 billion megasale of beauty brand Rhode and their 10-month-old son,Jack. The 28-year-old "has begged Justin to take some space," adds the source. "She's clear that it's not a step toward divorce, but just time to regroup somewhere private. If not rehab, somewhere he can go to focus on wellness and self-care." The "Sorry" singer, 31, has sparked concern in recent months withhis erratic online postsand gaunt, disheveled appearance. Recently, he postedcryptic comments on Instagram, including that "God decides what we deserve," that he's "tired of transactional relationships" and that he wants to "be seen for who I am" because "this s**t ain't easy." Fans have taken notice of his increasingly strange online persona, especially after heposted a photo dumpof poses and taunted his followers, "U could point at my flaws or you could recognize ur own." On June 8, the model seemed to bereferring to their troubleson Instagram. "Lemon drop martinis and therapy all summer long," she wrote, then quickly deleted the therapy mention. Says the source, "Hailey's made it clear that without some kind of break she doesn't know how much longer she and Justin can keep going."