Wow, what imagery!

I see many symbols here. First, what did you think of the red spider? Was it scary? Was it just interesting? How you feel about it may help with the interpretation.

With shells, what I get is the expression, "come out of your shell." It's like a protection. So, this thing that is like a red spider to you comes out of your being (not literally) and just floats away.

Babies often mean a new beginning or a new project, job, relationship, or atitude. This new thing (the baby) puts the protection (shell) back where it was. It was at your grandfather's steps. How do you think your grandfather may relate to this dream?