
is the snake really the deity brother?

But, after read the raw, i think the snake had an interest to the deity is only when they were a kid, and now he looks like have special interest in the deity's child. And, the snake is really strong and like to bully the deity, maybe thats why the deity is a bit scare of him. But they were already be friend since a long time, and beside his evil personality, the snake is a good friend and big bro. Thats what i can conlude from the raw, maybe there're some mistake, coz i don't understand the language, just tried to understand by the art. Ah, and for the bite and sucking blood, maybe its just the way deities to get power. ╮( ̄▽ ̄)╭

he drank the war titan blood but the jaw titan also received some portion of it, didn't he?

I noticed that too, I'm not sure as to the consumption of the blood but I think what mattered was that Eren ate the host of the War Hammer Titan, or rather what was left over lol. Because I think forcing the Jaw Titan to crush the crystal between his jaws possibly broke some teeth off and I think Eren was able to eat her that way.

I guess we'll all find out within the next few chapters ヾ(❀╹◡╹)ノ~ it just seemed like Eren succeeded in eating her because he looked like he got a huge power surge in the top two panels:
http://www.mangago.zone/read-manga/shingeki_no_kyojin/mr/vTBD/c104/pg-30/

i have a feeling it’s going to be a lot easier to understand once it’s animated. lol
Isayama’s getting better but the drawing’s still not very clear sometimes. (hard to make out who’s who, and what’s going on)
i wish they will show us more of the main couple