Coosje van Bruggen (June 6, 1942-January 10, 2009) was a Dutch-born American sculptor, art historian, and critic. She collaborated extensively with her husband, Claes Oldenburg.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Coosje_van_Bruggen

Spoonbridge and Cherry by Coosje van Bruggen & Claes Oldenburg
1985-1988 / Aluminum, stainless steel, paint / 354″x618″x162″ / Walker Art Center, Minneapolis, MN

Coosje van Bruggen on Artnet: http://www.artnet.com/artists/coosje-van-bruggen/

Further reading:
https://dsmpublicartfoundation.org/artist/coosje-van-bruggen/
https://arthistorians.info/bruggenc
https://ocula.com/magazine/insights/claes-oldenburg-coosje-van-bruggen-shared-history/