Aug. 10 (UPI) -- Kailyn Lowry's elder sons shared a sweet moment with their newborn brother in a photo this week.
The 25-year-old Teen Mom 2 star posted pictures of 7-year-old Isaac and 3-year-old Lincoln with Baby Lo on Wednesday after welcoming the infant Aug. 5.
"Nothing compares #motherofboys #momx3," she captioned the snapshots for her 3.1 million Instagram followers.
Lowry shares Isaac with ex-boyfriend Jo Rivera, Lincoln with ex-husband Javi Marroquin and Baby Lo with Chris Lopez. She told Radar Online she and Lopez have yet to give Baby Lo an official name.
"We don't have a baby name at all, and we don't have any ideas either. I feel like everything we thought we liked doesn't fit him," the star explained.
"I wasn't disappointed at all," she said of having another boy. "Boys are all I know, so I think it worked out for the better. And I always said I could never picture myself with anything other than boys."
Lowry discussed the challenge of picking a name on Twitter after posting a first photo of Baby Lo on Instagram earlier Wednesday.
"Isaac said the name Murphy was 'eh, okay... for a dog,' and also suggested Francis," she tweeted. "linc is still adamant about naming baby Lo 'climber.'"
Lowry said in a since-deleted blog post in April that she will be raising Baby Lo as "a single parent." She co-stars with Jenelle Evans, Chelsea Houska, Leah Messer and Briana DeJesus on Teen Mom 2, which airs Mondays on MTV.