Now back in you cave home, you set Talek down on a spare bed roll while she rested. Since she most likely be angry when she woke up, you created chains of stone to keep her implant so as to not let her kill when she woke up. With that now settled, you spent the next few hours absorbing the knowledge from the rest of your books until none were left and you felt like a literal master of magic.
Hearing shuffling in your reverie, you saw that Talek was waking up.
“Oh my head, if master finds out, he won’t like that.”
Talek noticed the chains on her wrist but didn't say anything about it like they didn't matter. Still sore from her apparent headache, the once lizard woman then noticed you and became frightened but also anxious at the same time.
“Master, I didn't see you there. Is there anything you need of me.”
At first you simply chalked up her mentions of master as another person but now you knew she was talking about you and you didn't care whatsoever. In fact her submissiveness to you made you aroused and caused your pole to reach full height and lay in you lap for her to see.
“I see, then would you like…”
She flipped onto her back with her still wet vagina hanging in the air. Seeing this your arousal reached new heights if that were possible but your intellect stayed in control as it remembered one fact.
‘After getting bigger, sex felt better.’
With that in mind, you created 2 collars from nothing with runes only you could understand inscribed on them. Attaching one around your collar and the other around Talek, you set to work. What the collars did was read you mind and caused the changes you wanted to occur for both you and any others who wore one.
Like the times before, you and your muscles grew in volume and height until you were at least 25 feet tall and over half way up the caves height. Next your 4 foot long penis grew till the tip was at the base of the floor at 15 feet long and you girth grew until you were 2 feet around. Finally your balls filled with cum, causing them to sag until each was the size of a 6 foot man in all directions.
With your transformation done, Talek’s began. She grew as well in height until she was 19 feet tall which he books sit right at the base of your cock. Next her bubbly ads grew until each were so large that a normal man could use them as inflated chairs and not worry about falling off as they kept their tightness. Next were the blobs that grew until they were as big as your cock while keeping the same level of sag and fullness from earlier. Next were the hips and waist that both widened and shrunk respectively giving Talek a milf like look. Finally was her mind which you changed from obedient servant to submissive cock hungry whore.
Seeing the drool pour from her lips at your meat stick, you let her start. First she raised your cock with ease but you didn't like that and shrank her slightly defined muscles until she was smooth with fat all over you even her a slight purge in her gut though not large. With this change, she couldn't even lift the head from the floor so she simply grinded her entire front on your cock in hope of getting off but it was impossible. Enjoying her struggle enough, you hardened your cock further until it was at least eye level for Talek and stronger than steel.
Not giving her time to react you slammed your cock down her throat in one shove, which caused an instant orgasm to Talek thanks to here new sensitivity. Pumping in and out for awhile, you soon got bored while Talek continued to cum every thrust. Leaving her mouth you were given a slight boob job while she sucked on the very tip. Ready for the main course now, you picked up Talek but found her to be heavier than expected so you simply grew your muscles more until your pecs were almost as big as her boobs. Ready now, you inserted and started pumping for 5 hours straight without stop while Talek still bummed. At one point, you started sucking on her tits and found them to be filled with milk.
Finally on the 6th hour, you cummed. To a regular person, the sex would have turned them into a unwatched water balloon on a hose at full blast but thanks to the collar, Talek took it till she looked 8 months pregnant. Seeing her belly like this, you gained an idea. You changed her fertility till she would give birth to 10 regular babies but they would grow till they reached your sizes respectively with you for boys and mom for girls, another fun fact would be that their body shape would be almost exactly the same as your’s and Talek’s in the end.