You and Gemma never got along very well, even more so when you moved from Charming after you and Jax broke up as teenagers, yes, Gemma was extremely spiteful, she still didn't like you because of things from when you were a teenager.
So, yes, it's strange to see two people who used to have so much beef simply laughing and having fun as if they were best friends. The League was doing everything to scare SAMCRO and their old ladies, and when you spend years away from daily and gratuitous violence (a very present element in the gang's life) it was natural that you would be afraid, after all, death could hide you at every corner now.
"No, no, no, sweetie, you're holding itway too hard." She said a sigh, still helping you to train with a .38, she stand on your side and guided your hand, calmly and not caring if you're closer to her, something rare, Gemma letting people even look at her without the older woman pointing a gun to them was like..something impossible to think. "You need to ket it breathe, the gun will bring a recoil." She explains.