« parlaient / parlais / parlait de » (passé, action en cours à ce moment-là).
A piece on Schiele, the guy Lucie and I were talking about.
Un article sur Schiele, le type dont Lucie et moi parlions.
— Blue Is the Warmest Color (2013)
Is that what you were talking about last night?
C'est de cela que vous parliez hier soir ?
Tom and Mary were talking about their plans.
Tom et Mary discutaient de leurs projets.
The old men were talking about life.
Les vieillards parlaient de la vie.