Justin and Hailey Bieber seem to be test driving their sister’s newborn to see if it might be a good fit for them … ’cause they sure do look like a couple of parenting naturals.

The Biebers visited Alaia Baldwin in the hospital this weekend to check in on her after giving birth to a baby girl, Iris, whom JB and HB were all too happy to pose with and cuddle. Check out Justin cradling the kid with his shirt off … dude seems ready to be a papa!

Also of note … he and his wife were both wearing masks while getting their turn with the child, so good on them for being responsible. We must say, a baby looks good with them.

Alaia — Hailey’s older sis — announced the birth of her and Andrew Aronow’s kid Thursday, writing … “?IRIS ELLE ARONOW!?Born on 8/17/2020, 6lbs 11oz. She is absolutely perfect, we are all happy and healthy. Thank you so much @drthaisaliabadi for making our experience go as smoothly and as beautifully as I ever could have imagined. We love you! ?”

Alaia is just 4 years older than Hailey, so still plenty of time for the latter to become a parent if she wants. But, with this bundle of joy now in her and the Biebs’ life … ya gotta wonder if that’s gonna expedite things a bit.