ofcrse they will accept him as their son, but i'm not sure whether soham accepts them or not, as his varsha maayi is everything for him and evn balan is certainly not ready to loose him...may be bishnu will see the posters of varsha which are stick all around the city...but it is very logical and this show doesn't have any logic...
if at all bishnu/balan see the poster then they will try to find the truth, as already balan suspects something because of varsha's behaviour...i am sure bishnu might fight if at all varsha goes to jail...
the biggest thing is how manav/archu will accept a kidnapper/goon as their son...will all bishnu's crimes be forgiven because he is son of mahaan archu...