OMG! Sooooo glad I found out BEFORE I planted.
I was admiring some greenery a gal uses in her cut flowers with pretty blossoms that looked like berries inside and so she gave me some cuttings. She didn't know what it was. As I was trying to root it, I asked around. Bittersweet. Too invasive for me so I had to throw them out also. they're so pretty though.