Sentence:  That picture wasn't much to look at, being so old and all, but Mrs. Oaks made like it looked so nice; or, that's what she said as she stared at it, looking back and forth at the picture and me like it wasn't so. Only, she just didn't know <WSD>how so</WSD> it wasn't. It wasn't me at all. 
Meaning of the word marked with <WSD> tags:  Why; For what reason.