No!  Jim should not answer the phone unless he can say, "It's my Mom" or "Hey, Mark!"  For Karen (if it was her), flip the phone shut.  She'll call back.  (Like a bad penny, Karen will always show up.)

Maryuc, please watch out for my grief bone in future chapters.  We need some hope to offset all the misunderstanding and angst on the real show!!  (Well, I do anyway.) 

Nice writing, though.