Alec Baldwin's very pregnant wife Hilaria lifts weights in bed while only wearing lingerie

Hilaria Baldwin doesn't stop, even when she's about to pop.

The yoga instructor, 32, is currently expecting her third child with her husband, Alec Baldwin, and she's making sure she continues to be one of the fittest moms out there.

In a new Instagram video, Hilaria impressively performs tricep curls with a 7-pound weight. Oh, she's also in bed and only wearing a lacy bra and knickers set.

"Don't stress about the weight," she wrote to her followers. "I'm good at throwing them around...lots of years of practice and good aim."

The mom to Carmen, 3, and Rafael, 15 months, is no stranger to sharing her pre-natal fitness regime.

"Getting towards the end of pregnancy, it is hard to stay fit," she previously posted on Instagram. "I worked out every day I was pregnant with Carmen, less with Rafa, and with this one…. I REALLY have to get creative and make time."

Check out more of her baby bump posts below!