credit: social media

Heidi Montag works out on the beach in a red-hot bikini....

credit: social media

On a recent trip to the beach with her family, a clearly pregnant Heidi Montag 

credit: social media

didn't seem worried about her noticeable baby bulge

credit: social media

pausing to perform a quick gym routine while donning a red-hot bikini,

credit: social media

as seen in a film published yesterday on her Instagram.

credit: social media

The 35-year-old "Hills" alum can be heard telling her husband

credit: social media

Spencer Pratt about her intentions in the 15-second clip, which he appears to have recorded.

credit: social media

wearing a cherry-colored triangle bikini top and pants with tie-sides.