So, while the truth about Gemma brings Clay and Jax back together, the truth about Donna also comes out, and we're splintered again.
After the club finds out about Gemma, they are all down to chop Zobelle's guys into little tiny pieces. However, Clay tells them they have to be smart about this. They've all got pending assault charges and ATF is afoot. Jax follows them and finds out that Zobelle is selling guns to the Mayans, but is keeping Weston out of the loop. They think they can use that to sow seeds of discord among the group.
Meanwhile, Tig goes to Clay's to get some guns, and Gemma basically throws herself at him (she's afraid that Clay won't want her anymore after the rapes). He reciprocates momentarily, but then backs off. Right after this, he heads over the tells Opie the truth about Donna. He explains that Stahl set him up to look like a rat. Opie beats on Tig a bit (which Tig lets him do- this is not the first time we've seen Tig accept a beating for something he felt he deserved) and then heads out to find Stahl.
While he's following her, he sees Chibs come out of her office with paperwork (he's sort of agreed to roll on the IRA since Jimmy O threatened to rape his daughter) and then follows her. Once she's alone, he threatens her, but allows her to live. She's visibly shaken.
Opie realizes that the rift because Jax and Clay was because of what Clay had done. And he and Jax finally reconcile. Jax tells Opie that Clay is way because of them. They made him into the man he is.
At the next meeting, Chibs comes clean about him talking to Stahl, but says he didn't sign anything. Clay says it's cool. They promise to protect his famiy. Then, Piney bursts in and starts shooting at Clay. He misses and the club protects Clay. Opie talks to him, and comes out and tells Clay that he did it because he thought Opie might and didn't want him to get in trouble for it. It seems like Clay forgives him.
After all is done, Tig tells Clay that Gemma just really needs to know he still wants her. (When did Tig get smart?) So, he heads into the office and has sex with her on the desk.