Credit: Courtesy of Evan Ross

My beautiful wife @ashleesimpsonross and our baby girl in that belly... Life is better is amazing !

A photo posted by Evan Ross (@realevanross) on Mar 25, 2015 at 5:18pm PDT

Baby in bloom! Evan Ross is clearly smitten with his pregnant wife and their little daughter-to-be. On Wednesday, March 25, the singer-actor took to Instagram to show off a photo he took of love Ashlee Simpson channeling her inner boho goddess.

The second-time mom-to-be — who has a 6-year-old son, Bronx, with ex-husband Pete Wentz — was the picture of serenity as she cradled her growing baby bump. Donning an empire-waist floral dress with large hoop earrings and a delicate flower crown, Jessica Simpson's younger sister gazed off camera as she walked a path along a lush green lawn.

"My beautiful wife @ashleesimpsonross and our baby girl in that belly," Ross captioned the shot of his wife. "Life is better is amazing!"

Us Weekly confirmed in December (four months after the couple's wedding at his famous mom Diana Ross' Greenwich, Conn., estate) that Simpson, 30, was pregnant with her second child. She announced in February that she was expecting a daughter.

"I like to know — I want to do the nursery," the Melrose Place alum told reporters at the time. "I'm just excited for the new addition." Of her son Bronx, she added, "He wanted to have a sister, so he's really excited!"

He's not the only one, of course. Ross told Wendy Williams last month that he and his wife were eagerly picking out names for their little one. "We got a few ideas, but we're keeping that for us," he teased. "It's not going to be Apple or Orange or anything like that. It's going to be different, though."