He thinks about effectiveness

Kazex got up and went to check on the forest drider. She seemed to be asleep now, though it was clear she had been crying. There lay the beginning of his army, possibly already bearing his first young. Kazex wanted to take her again, but a thought came to his mind. While it could take as little a week, it could also take as long as six months. It would be really ineffective to build the army up this way. He needed more females. He decided to voice his concerns to the witch.

Heading to the tower, he found the witch was outside, seemingly practicing some kind of magic. He went over to her and got her attention.

"Oh, there you are. How did the first time go?", she giddily asked, clearly interested in the future of her goblin army. Kazex thanked she was enthusiastic, since it would help his goals.

"Can't know for sure, at least for a few days. But I was thinking, it would be really ineffective for me to just have one female as my breeding ****", he told her, and she began to consider the options before reaching a good solution.

"Okay, but I need to see results first. After the first goblin is born I'll go out and catch another female for you", she told him, and Kazex nodded. He just hoped it wouldn't be too long a pregnancy. He then headed back. He decided it would be best to bolster his chances by doing it again, and since the potions have long effects, lasting a few days, it's more effective to do it multiple times, to make sure she is impregnated.

She was still sleeping, but Kazex decided to wake her up by taking her again, taking his cock out and taking aim at her still-exposed pussy.