Back home, Asgore was still to spend the night with Undyne at Toriel's request, unsure what she had in mind but complied anyway. That night, She sat in her bedroom and laid on her bed, running her hand between her folds, hidden away behind her robe. She stripped off the garment and sat in a pair of black panties and a humble bra, hugging her large, full breasts tightly. She picked up her phone and smiled as she opened the messaging app, "Time for your reward, my children~..." she cooed.
She sent a short message to them and waited, "come to my bedroom, have surprise for you, come naked ];)"
She heard her two boys briefly talk in their room and eventually leave, opening her door as Asriel and Frisk both walked in, both children walked in naked as she stated, bearing quite pleasingly sized members and wide breeding hips. Asriel yawned and rubbed her eyes, "Mom, what is it? It's like, half eleven..."
"My children," she started with a bright smile, "you two have done so well in this last semester, and with Frisk juggling those human-monster meetings too, I wanted to show you both just how proud I am."
"Aw, thanks mom!" Frisk blushed and replied, still raising an eyebrow, "But why did you have to wake us up and for us to be naked?"
“Well,” she unclipped her bra as it dropped into her lap, removing her panties and letting them fall as she laid on the bed, groping her tits and saying, “I want to reward you~...”
Asriel beamed as he climbed onto the large bed and shuffled up to her side, taking her right breast and wrapping his lips around her full, puffy nipples as she gasped in pleasure, “Ah! Asriel~...”
Frisk was still hesitant as to what she had in mind, standing around nervously as Toriel noticed and patted the space beside her, “Do not be shy, my child. Come, take your fill…”
Asriel looked up and stopped suckling, a squirt of milk from her teat as he swallowed his mouthful and added, “Come on, she tastes great!”
Frisk shrugged and walked up to the bed, climbing onto the soft duvet with a smile and hugging her mom as she wrapped an arm around him and cuddled him to the best of her ability. The young caprine watched his brother drink from her mother's breasts curiously, Frisk couldn't remember the last time he did this, but if Asriel seemed to enjoy it at his current age, then it must be a monster custom he didn't know about.
“Well, here goes.” He said as he too wrapped his soft lips around the teat and suckled, getting a taste for the soft flesh before feeling her milk lactate from her nipple as he tasted it. It was quite creamy and very sweet, with just that touch of cinnamon and butterscotch. He smiled and began drinking more heartily as Toriel gave a delighted sigh.
The queen looked at her children drinking from her and smiled warmly, relaxing as the feeling of her milk lactating from her large breasts scratched an itch she hadn't had since she took care of Chara. Her chest tingled with an almost relaxing vibe, like she was being massaged and gave a delighted giggle as the milk flowing tickled her body all over, “Ooooh yes~~, you two are so wonderful!”
She laid back and relaxed, eyes closed in bliss as her children drunk from her teats, feeling a warm sense of comfort as she was surrounded by the children she loved, and her two sons snuggled up to her as they drunk, their lips teasing and kissing the nipple as they drunk the milk flowing from her lactating breasts. The milk filled them with a comforting feeling as if they were completely safe in their mother's radiant warmth. The three would spend the night drinking and snuggling together, and it made them love each other even more.
“I love you two so much… Please, make your mother and father proud!”
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