Briana Jungwirth is dating American singer Jayk Purdy.
The stylist - who has eight-month-old baby Freddie with One Direction star Louis Tomlinson - recently started dating the After Romeo singer and has shared a number of pictures of him on her social media pages.
And Jayk, 30, appears to be close to Briana's family as she posted a number of Snapchats of them all out for dinner together earlier this week.
Briana and Jayk are believed to have met through mutual friends.
Meanwhile, Jayk and his bandmates previously claimed they had to be escorted out of a One Direction concert twice because fans got overexcited when they saw them.
Drew Ryan Scott said: "At the very beginning of our group, we all went to a One Direction concert just to see what it was all about, and see the territory and what was going on.
"It got so crazy in there because fans looked at us like we were some amazing band and they all started going crazy. Everyone went nuts and One Direction's security actually had to escort us out twice because they were all swarming us because we couldn't get to our seats. We ended up having to watch the whole concert from the side stage. It was cool."
And the band appear to be relishing the attention from Jayk's new relationship, with Drew tweeting: "I always vote for @onedirection did u see this" and sharing a link to an article about Briana and Jayk.
He also made it the pinned tweet at the top of his account.
Briana got pregnant after a brief fling with Louis last year but the pair have a strained relationship, with Briana said to be jealous of Louis' girlfriend Danielle Campbell.
Earlier this year, after pictures emerged of Louis, 24, enjoying a day at the beach with their Freddie and Danielle, 21, Briana took to her Twitter account to post an angry tweet.
Briana wrote: "You can pretend all you want but you will NEVER be my baby son's mother."
Briana's message came just weeks after it was claimed that her and Louis' custody battle over Freddie was sparked by her jealousy over Danielle, who Louis started dating last year.
Speaking previously, a source close to the mother of one - who gave birth to her child in January this year - said: "Before Briana got pregnant, she was bragging to friends about how serious she was with Louis. She thought it was going to be a real relationship.
"When Louis started dating Danielle, Briana was upset and that's when the drama started.
"Briana really tried to make the relationship work, and she became jealous when he moved on.
"When she was pregnant he was very supportive and paying for all her medical needs. He bought her a house, but she wanted something bigger."