I have Soriel fluff if you are still wanting some. I like to imagine them as cuddly couple. Like when they watch TV together on the couch (or Sans naps while Toriel reads) Sans often uses Tori as a pillow. She'd probably make a very soft and warm pillow, especially her chest. So she rubs his head (or plays with his hair if they are humans) when he lays on her and it puts him to sleep faster. And Tori's so strong that when it gets late she can just carry her smol man to bed without a problem.
YES!! YES YES I HAVE NOTHING TO ADD THIS IS ALREADY PERFECT!! ! ! !
i love the idea of human AU Toriel stroking his hair.... I MAY OR MAY NOT BE INTO THAT... But. Also Sans playing with her hair. Especially the designs, playing around with her hair loopies. IMAGINE SANS BRUSHING HER HAIR why do i do these things to myself I LOVE CUDDLY HEADCANONS THEY ARE THE BEST.
Even better, I love canon sans playing with her ears. Using them as a sleeping mask. As a blanket. Just. Sans playing with Toriel’s floppy ears.