Heard on The Judges: new extension?

[Wilson Gray]

Mid-thirty-ish white female "standard" (i.e obviously not a Southern
speaker, but there's no other claim that I can make) speaker:

"Well, our real problem is that Jane _is sisters with the landlord_."


I've heard _BE friends with NP_ probably from birth. But I would expect

"... Jane is the landlord's sister"

in this case. The other version is brand-new to me.
--
-Wilson
–––
All say, "How hard it is that we have to die"---a strange complaint to
come from the mouths of people who have had to live.
-----
-Mark Twain

------------------------------------------------------------
The American Dialect Society - http://www.americandialect.org