Something to boggle your mind

A sentence in an article that I stumbled across on the net had me absolutely gobsmacked for a moment - it was, "...her husband's sister's husband's brother". Huh?

English is not my first language.

Nowadays, I rarely speak Khmer or the Chinese language that I grew up with, so English does feel like my first language however sentences like that can still confound me. I tell ya - I thought I had conquered the English language sufficiently but all this geneological-family-tree stuff still stumps me occasionally. 

"...her husband's sister's husband's brother"... Did that make sense to you?

Here it is in pictorial form if it didn't: