I think they played the Gemma "ridin' dirty" scene in the porto very well. She wants Weston dead, and was willing to take her chances. But hearing him on the phone with his kid pushed her mommy button and she couldn't do it. I think maybe they will write in a way for Clay or Jax to find out about the "incident" in a unique kind of way and Weston will get his.
Or not--so far the writers have continued to surprise me in just how twisted they can be. And I do like that.