“Bye bye Maui,” The Sopranos alum, 36, captioned the image of her 3-year-old son Beau kissing her bare baby bump on the beach.
Last week, the actress shared snapshots with husband Cutter Dykstra and their growing family during their Hawaiian getaway.
Earlier this month, Sigler debuted her baby bump on social media.
In July, the Divorce Invitation actress and her professional baseball player husband, 28, announced their second pregnancy.
“This is the actual pic I sent my husband this past Mother’s Day while lying on the bathroom floor. I had just returned from Israel, was jet lagged, and didn’t believe my eyes. So had to obviously be @Clearblue 5x over sure. We are SO excited to announce the #ClearblueConfirmed arrival of another little one in just a few short months #clearbluepartner,” the actress captioned the selfie with several pregnancy tests.
The couple were wed in Jan. 2016 in Palm Springs, Calif.
Last year, Sigler revealed her 15-year struggle with multiple sclerosis, and her hopes to expand the family.
“I don’t know what’s to come. But I’m excited for the first time in a long time,” Sigler shared. “I’ve got my brain and my heart and I’ve prepared myself for everything that could happen. But I’ve got an amazing husband, the best son, and I hope that we can make more babies and just keep having fun. I’m the luckiest girl in the world.”