Just as you find Sarina outside riding a horse towards your location, you begin to have second thoughts about what will happen if she sees you like that, as you think that she'll stab you, or behead you in your new form as a sign that she won't love you anymore. Seeing this, you start crying, and run back into the cave, and return to the queen's chamber.
However, Sarina heard you crying, and rode off towards the cave you dwell in. As Sarina gets off her horse, she gets closer to the entrance of the cave, and pulls out her spear, while at the same time using it to rip apart the webbing that was stopping her from going any further. The tiny spiders weren't as strong as the big one that fused with you, meaning it was safe for Sarina to defeat them due to their lack of size. Once all the spiders were dead, Sarina got closer to the cave.
By the time Sarina has reached your location, she notices the giant yellow spider rump you now had, but placed her weapon up, by the time she heard the sound of your voice through your crying, which causes you to turn, and find her.