How serious was Kailyn Lowry‘s relationship with ex-girlfriend Dominique Potter? Well, according to “Daddy Dom,” it was so serious, the Teen Mom 2 star was ready for baby No. 4. In a new interview, Dom claims that Kail wanted another child with her — using her baby daddy Chris Lopez as a sperm donor.

“We definitely talked about the future,” Dom, 23, told Radar Online. “It was hard with me being in Jersey so we discussed me moving to Delaware. Not necessarily me moving in with her, but close to her so we could have that family aspect we both wanted. I really liked the idea of family.” However, when Kailyn brought up the idea of having a child with Dom — with a little help from Lux’s father — she was shut down.

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“That whole thing came out about Chris possibly being a sperm donor for her,” Dom added. “She’s asked me, whether it was joking or not, she’s asked me if I would be okay with it… Having his be mine. Of course I wouldn’t be okay with that.” However, that doesn’t mean that Dom didn’t develop a close relationship with Kail’s boys, Isaac, 8, Lincoln, 4, and 10-month-old Lux, earning her the nickname Daddy Dom.

“I felt like I had that same responsibility to take care of them,” Dom explained. “We all got along so well… That’s a strong connection I’ll definitely miss. She would make comments, ‘My kid doesn’t have a dad.’ I was putting the baby to sleep one day and she said, ‘Oh look he has a dad, Daddy Dom.'”

Unfortunately, the couple split after a few months of dating and Kailyn, 26, has since apologized for unintentionally leading Dom on. “Dom & I dating — I wasn’t trying to deny her or a relationship & we had fun while it lasted but things didn’t work out,” Kail tweeted. “I’ve learned a lot over the years and wanted to keep things private & off the show but I don’t think I really handled it properly.”

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