Don't know. There were Italian translators at Ellis Island so it's possible she and the child could have been released without her future husband there and travelled to Seattle on her own.
It's too bad...later detention pages often show who picked up the detained person.... who were usually females that would not be released except to members of her family. So it is possible that her future husband got her....
You might want to play with:http://www.stevemorse.org/vital/nymarriages.html?index=groom
for NYC to see if they got married there.