Even frozen yogurt couldn't boost Hailey Baldwin's spirits Sunday as she hung out with her hubby Justin Bieber's mom Pattie Mallette in Laguna Beach.

Hailey was dressed to the nines in a silver silk slip dress with sneakers and a khaki Drew coat in support of Biebs' clothing line.

She looked a little depressed -- and totally dismissive of Justin's mom -- during the outing. Perhaps she was tired of the cameras following her while she's trying to plan her move with Bieber to their new Beverly Hills home, work out details of their on-again-off-again-on-again wedding, all while Justin is getting treatment for depression at a local clinic. It's a lot!

We hope Hailey, who's clearly the backbone on the relationship, doesn't have to start seeking treatment herself, with all the stress she's taking on!