Okay, I didn't really think this through , so there's not really a "moment" going on there, but since Toph's on her metal armor, I thought maybe she just got home... (?) or whatever \o/
Anyway, I was going to add some shadows, but got too lazy

So, Toph and Lin

Toph and Lin (c) Bryke
EDIT: Ok changed the background colour again

thanks for the advices guys, it's really helpfull! :3 idk if this colour is better, but I just didn't want to put anything that differs too much '-' anyway, maybe one day I'll stop being lazy and do some real back ground lol ahah
As for who the father is, and I'm not trying to sound like a wiseass here, I wouldn't be asking if I know who he was now would I. My guess bet is that it's some new character the creators made up and haven't revealed.
I really think it would be awful if they came up with a new character as Lin's dad, but it will probably be what happened. You know, in the comics, Toph had a thing with a guy, apparently he used to work at her house, or he is the son of someone who worked there, idk, maybe it could be him. aaaaaaaagdhsdgs idk this is really messy, I hope they give us the answer soon, and hope that they don't disappoint us