They decide to make him like Peter.

Looking down at their prize and back at the red haired monster plotting his fate, Cindy and Gwen chuckled. "Variety is the spice of life MJ, besides, having another rooster in the henhouse will make Peter EXTRA enthusiastic to prove himself to us."

"Ooooh! I like that." Purred MJ, taping a clawed finger to her fanged lip. Shivering at the idea. "Oh hoh, I just can't wait."

Squirming and struggling to break free, Miles looked up at the three, hoping to distract them to get free. "Don't I have a say in all this?"

Narrowing her eyes, Cindy grinned as she pulled his mask off and with another hand pinch his cheeks to force his mouth open. "I can think of one thing you can say, say ah!"

Hefting one of her massive breasts and tweaking at her spurting nipple, Cindy shoved it into Miles's mouth and shared a chuckle with her pack sisters as he muffled and cried out when poisoned milk flooded his mouth. Forcing the man to drink as her portion of the symbiote infected his cells and bonded with him. The moment it did, his mind was flooded with urges and thoughts that weren't his own. Overwhelming and ragingly impulsive they flooded his psyche, making it almost impossible to think on anything save for the most basic of needs; hunger. Almost instantly a pot belly formed as he was forced to drink more and more, his arms and legs getting thicker as more of his flesh yielded to the symbiote now infecting and changing him.

Pulling her tit away from his gasping and coughing mouth, she shoved her other breast into his mouth, the trio of venoms laughing as they leered at his growing physique.

"Ooooh, coming along nicely..."

Grunting as his costume burst at the seams, his skin began to become pitch black, creating stark white patches over his hands and forming a spider emblem over his chest and growing gut that matched his old costume. Cindy watched on with amusement until she finally ran dry and Gwen took her place, force-feeding the other Spider-Man and watching him grow and turn. By now he was half as big as they were, sprouting additional arms and becoming fanged as he bit down on Gwen's breasts, making her shiver with delight.

Watching her pack sisters turn the man, MJ's mind raced with the possibilities. Why limit herself to one man? Those were human concerns, they were a pack, not a couple, and the more lovers the merrier. She even wondered what Miles's eggs would be like next to Peters. The moment she had those thoughts, something gave way inside of her. She could feel a growth form above her bulbous ass cheeks, swelling large and heavy until it matched her backside and sprouted spinnerets, new eyes formed beside her originals and a pair of prehensile fangs appeared from inside her mouth to flex like lingers at either side of her toothy smile, rattling like rattlesnake tails. Gwen and Cindy soon joined her in her changes, growing larger and more gruff looking.

They finally caught up with their pack leader. And so was Miles underneath them, something MJ discovered when something long and hard poked against her overfed gut. Looking down she licked her fanged lips at the sight of his massive cock throbbing between his fat legs and under his own large gut, bucking his hips as his mind was filled with the need to feed and fornicate. Seeing the opportunity, MJ straddled his waist and guided his cock towards her moist and hairy folds to sink down to the hilt of his girth.