Kailyn Lowry posted a photo of Chris Lopez bonding with their newborn son over the weekend.
"Are they twins or," she captioned the picture on Instagram Stories.
Lowry welcomed "Baby Lo" on Aug. 5, but has yet to announce her son's legal name.
She also has yet to confirm her relationship status with Lopez, although the new dad did say Sept. 6 that he's part of his son's life.
Lowry had said in an interview with Radar Online in August that Lopez will be a father to their child.
"[I'm] positive he'll be around," the star asserted. "I think every child deserves a dad."
Lowry is also parent to 7-year-old son Isaac with ex-boyfriend Jo Rivera and 3-year-old son Lincoln with ex-husband Javi Marroquin.
She came to fame on the MTV series "16 & Pregnant" before starring on "Teen Mom 2."