I always thought this was a song about a man finding out his lady was cheating on him. It’s actually a song about a band member having a side gig with another band.
You get some nice early disco in this extended version, starts of with a Marvin Gaye-esque groove and then kicks into disco as the song progresses. This song would lay groundwork for his #1 pop breakthrough "Keep on Truckin'"...
Girl You Need A Change of Mind {album version} - Eddie Kendricks