Kate Hudson getting cozy with ex-husband, Chris Robinson.

Kate and the Black Crowes rocker reportedly were caught in a lip-lock just outside the apartment she shares with their son, Ryder, OK reports.

“They were really affectionate with each other and gave each other a kiss which lasted much longer than a platonic kiss should last — 20 seconds, maybe a little longer,” an eyewitness revealed. “Without going into all the details, the kiss was more than just friends. They seemed like (there was) something more going on and were very affectionate with each other.”

Image WENN