Moonpie

Like. Imagine that you are Chiaki. Imagine this: yours is the power of foresight, and you were already warned about the upcoming talks. You were warned of the hostility, but not the brutality. Your childhood friend is on the team that will head there, surely your powers will allow you to watch over him, surely you would be warned if he were to be at risk, surely you will be able of knowing that he is safe. Surely you have given enough of yourself to your power that for once in your life your power will reciprocate. But it doesn't, and it's not enough, it will never be enough - your power and your title will consume everything that you are until there is nothing about the girl who used to play out in the streets with her friends left, and it is too late to stop it from happening. It has always been too late. Your death sentence has been sent through your friend, but his half-dead body has always been the true message.

(Images and further discussion under the cut to not spoil any new anime watchers)

If Gonzo married Akane so that Hikaru and Asuma would have a mother around (which is... not the best reason to marry someone, and I sincerely hope that it wasn't Gonzo's only one), then both brothers must've been fairly young to have needed one. Also, Jin was only born after Iori died, and I just don't think that Asuma and Jin have that big of an age gap between them: maybe 8-10 years max.

Not to mention, there's this panel as well though it isn't canonically confirmed to have happened after Iori's death:

Think about it. Asuma was around seven or so when he last saw his mother. He spent most of his life trying to avenge her, but do you think he even remembers her voice by now? He loved her with everything he had, but do think he has to look at photos to memorize her smile because he'll forget it otherwise? Do you?