You should have a condition to control it. For example, have a condition with a name "cut_scene_con" and make it false.
And just before cutScene_begin, write
if condition cut_scene_con = false then
begin cut scene
.
.
.
condition cut_scene_con = true
end cut scene


if x then
 ...
 if b then
  ..
 end if
else
 ...
end if