Yes, they do.
In an interview discussing the new series, Avatar: The Legend of Korra, they state that they have a child named Tenzin.
They also have two other children name Kya and Bumi.
If Tenzin is Aang's son, who is his mother?
DiMartino: [To Konietzko] We can say that, right? [To Speakeasy] It's Katara. It's not a huge surprise.
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In the first series, the answer is no, but in Legend of Korra they have a child named Tenzin and two other children.
Katara's bf will be Aang <3
Aang and Katara kissed at the end of The Last Airbender series and it is revealed in the sequel series The Legend of Korra that they had three kids together; Tenzin, Kya, and Bumi were Aang and Katara's children.
Aang would be extremely hurt, because he trusts Zuko and Katara, and he and Katara are kind of dating.
Jet was Katara's first boyfriend, but later on I think Katara and Aang are together.....Since the both show feelings to each other more.BYE!aang
yes in the last episode of avatar the last airbender aang and katara kiss