marisa-miller-third-trimester-baby-bump

Expectant mama Marisa Miller shared an updated baby bump photo via Instagram Thursday.

“Third trimester exhaustion- never made it out of my pjs yesterday. Can’t believe how fast pregnancy goes when you’re busy chasing a toddler,” the Victoria’s Secret model, 36, captioned the image.

In January, the model mom debuted her bare baby bump via social media.

This will be the second child – another boy – for the Sports Illustrated model and her husband, music producer Griffin Guess.

The couple – who were wed in April 2006 – welcomed their son Gavin in December 2012.