If there was a Rioter who said that Tryn/Ashe actually had a child in-lore, it would be common knowledge by now. We've been known to disseminate information pretty quickly, in the old forums or new.
From what I remember, the marriage between Ashe and Tryn, in the old Journals of Justice, was political. The marriage gave Freljord enough standing with the Institute of War to keep it safe from a full scale Noxian invasion. In real life, it also echoed the engagement between Marc Merrill (Tryndamere) and his fiancee Ashley.
When the Freljord incident happened, Kitae stressed that the two were still married but that nothing new or explanatory was going to come out of it for the time being. She later posted that it was more of a romantic relationship than a political one and that she wanted to tell the story when she was ready... (We all know how that turned out, don't we?)
These days, it's all in limbo since we're not getting much actual story content or confirmation from Narrative. All we're getting is the same old "the characters haven't changed much" and "please trust us that we're doing what's best" nonsense we've heard for three years.
As far as Annie goes, it's likely that she's going to remain a child. Morello and the rest of Riot have strong reservations against a "Teen Annie."