E! reports she'd like to pregnant with her next baby girl or boy by 2020.
"Kylie talks about having another baby very frequently," a source told the outlet.
"She would love to have another baby with Travis and would love to be pregnant by next year. She talks about it all the time and feels like she was truly meant to be a mother."
And then she left a telling comment on her friend Heather Sanders' message:
"Happy birthday Travis..I love you guys.. Perfect lil family now give stormiest a brother," with a blue heart and praying hands emoji."
Kylie replied that she wants a girl. "Sister !!!!"