If there was any doubt as to the inheritance, TS would have
said, "My dad is dead, I am not sure
if my dad left anything for my mom and me" and NOT
"he didn't left anything for my
mom.......he gave the house to my step brother". Understand
the assertiveness of the statement.
You obviously have language issue, living in an Anglophone
country has not help much, but then again intelligence is normally
distributed in the population, we have to tame
our optimism to suit your circumstances. 
TS story is choppy.. Too many missing pieces like VK says.
I doubt TS even knows exactly what is going on in his family
saga right now. He can't even tell us if there is indeed a Will or
not. Cannot confirm anything.
And yah.. we understand the "assertiveness" coming from a
confused 16 year old. Right. Hail mother Mary !
And there's so many pieces that doesn;t gel.. first his Step
brother is older than him.. and he donno the difference between a
step brother and a half brother.
Now if the step brother is his father's biological child.. then
that means TS mother is not his first wife.
Then ofcors.. we wonder why would his father give away his
assets to his first child that he abandoned ???
You ever consider these missing possibilities ???
