I decided to write a short story about Frisk and Toriel. Might write more if I feel like it.
It was obvious she knew. For as little skin her robe revealed, they never concealed her figure, and you've been staring at her ever since you dropped into her home. Only her sweet and motherly face could take your eyes from her body, but she always ignored or wordlessly dismissed that kind of attention you've been giving her. It was only until you suggested leaving that she finally addressed you as someone besides as an innocent child in an unfamiliar world of dangerous monsters. She recognized you as a male, even if you have yet to bud. Standing between you and a heavy gate, Toriel began to reveal a hidden, imposing part of herself. Despite the difference in height, you could tell that her eyes lowered further, to stop meeting with your own and to acknowledge what you've been trying to keep secret from her. Your shorts hardly bulged forward, but Toriel noticed you getting stiffer and harder all over, and had no difficulty guessing where else your body would be affected. When you realized that she was looking at your pants, you immediately put both palms in front of yourself, as though you felt naked from her gaze.
"So, I guess I know now how to get you to stay." Toriel's voice was still soft, but carried a much more assertive, even predatory tone. Both your and her breathing became difficult, like the air around you became thin. Her breasts lifted and lowered more strongly with each inhalation and exhalation, while your erection seemed to twitch with every heartbeat. "My child, I don't hate you or this part of you. In fact, I want you to stay with me, safe from the monsters out there that could hurt you." She took a step forward, and her approach had frozen you. Your legs flashed cold for a moment, then warm again, buckling slightly as if a great weight between them was introduced. "In truth, I was hoping this would phase out and we'd only need to discuss this when you get older." In a brief moment, after moving her hands back and releasing a few ties, Toriel's robes quickly draped from, then slid off her body, giving you the sight of a half-naked nude, voluptuous woman in pale white fur, her ankles covered by the long cloth she wore. Her bra and panties were of gray-white color, almost matching her fur and giving her a nude appearance. Her bra's cups were thick and struggled to prevent her massive breasts from bouncing, and the strings of her panties were tied into a knot at the side, thinner than even your fingers.
"I'm not against being with someone young, however. Actually, I might even enjoy it more, Especially if you promise to me that you'll stay. My child, we can be more than just a mother and son if we turn back. I may be an old woman, but if you really like me this way, then we can do whatever you please at home. If, and only if, you want to come home." Your genitals felt like they were under attack from each syllable that came out of her mouth, with your member's skin stretching tighter and tighter from every soft note of Toriel's voice reaching your ears. The friction from your shorts was nearly enough to make you cum, and Toriel understood that she needed just a little more to sway you completely. She walked past you, holding a posture that accentuated her figure and made her features bounce harder. She moved slowly enough to make your eyes dance across the surface of her body, with the full intent of pleasuring your vision with each inch of her frame. It was only when she had completely passed you that you realized she had actually walked forward, and she whispered something powerful into your ear.
"Meet me in your bedroom, my darling. We can start as soon as you arrive." You kept yourself entirely still, your expression unchanging until you stopped hearing Toriel's footsteps. The moment you felt you were alone, you tried to let loose a breath of relief, but instead pulled your shorts down, feeling a great natural instinct from your hips, and fired out several streaks of opaque semen, nearly falling forward as you flexed every part of your body which you could control, having been milked into an ejaculation by the sight of Toriel's curves and the sounds she graced your ears with. Even her footsteps which vaguely told you of her weight were equal to a tight stroke on your penis. You've liked girls before, you've seen photos of women in bikinis and got lucky enough to catch nipples slipping in the past. It'd be a lie to say that you've never masturbated before, but now it wouldn't make a difference whether you did, as you came like someone whose penis was never touched before. You continued to ejaculate, with the moments between each shot of sperm turning into seconds. You were rendered incapable of being satisfied form masturbation ever again, and you doubted that even human women could illicit a chub from you from here on. Without even touching you, Toriel had claimed and groomed you. If you were stronger, you'd wonder if the other monsters were like her and have used what little strength you had to push the gate open and escape, but you were a little boy who had only enough determination to stay awake despite the sudden awakening of your breeding instincts and the orgasm Toriel verbally delivered upon you. As soon as you stopped spraying cum over the floor, You turned around, mentally stuttered Toriel's name in your mind, and sprinted towards her house, leaving behind your shorts and a trail of dripped cum.