Thistle better understand that Lullaby didn’t mean to disobey her and did try to go to the cabin like she told her little filly to go to for own safety but Thistle’s messed up cousin Rusty got the jump on the little filly and tricked her to go with him as his way of getting revenge on both her and Tempest by using her baby bro and the evil Thunderstone crystal as a distraction.
I can see in future that thistle is going to be one carrying and protective mother and Tempest is going to be one daughter let go do some dangerous stuff same time protective mother without asking Thistle first. As long she is under Tempest vision she would be find.