"Come on, you have to be more mature. You can't make Mom worry about you again."
As Alex regained full control of his emotions again, he started to get a little sleepy.
"What's taking them so long?"
Seeing Sophia and Mary still not returning from drinking water, Alex slowly got up from bed before walking out into the hallway.
Without even walking one step further, the girls were standing right behind Katherine's bedroom door, with their heads tilted slightly to peek inside.
Getting a little curious, Alex began walking over to the two before tapping them on the back.
"What are you guys doing——"
"Ah!"
Both Sophia and Mary panicked, pushing the door inward as they turned back around.
"Who's there?"
Despite Katherine's question, both of the girls quickly ran back to their room, leaving Alex still confused about what was happening.
As he turned back around to see what was inside, Katherine was already standing in front of him.
"Alex, why are you standing here in the middle of the night?"
Katherine asked, her face blushing a little as if she had just done some sort of exercise.
Alex thought for a second, then decided to tell her everything.
"Sophia and Mary went to go get water, and I got a little worried that they were taking too long.
So, I decided to check... They were just right here earlier before running back to their room."
Katherine didn't doubt Alex's response as she had heard the running footsteps earlier.
"Those two little brat... Alex, go inside my room for a second. I'm going to go teach those two a lesson."
Alex nodded in agreement as he headed inside Katherine's room, sitting on the bed as the door to his room was opened could be heard.
With a loud laughing sound from the other room, a chill suddenly traveled down Alex's spine.
"Why is Mom so mad? Did she put them into some sort of tickle torture?" Alex wondered as he waited for her to show up.
After a while, Katherine showed up with both Sophia and Mary in her arms before dropping them onto the bed.
"How dare you two spy on your mom? If it wasn't for Alex, you two think you would have gotten away with it, didn't you?"
"I'm sorry, Mom... We just got a little curious. We didn't mean to spy on you."
"We will never do it again. I'm sorry, Mom."
With Sophia and Mary both apologizing, Katherine's anger seemed to be subdued a little.
At the same time, Alex could feel both girl's anger as they looked him dead in the eyes.
"Don't you two dare look at your brother like that. If I catch you two hitting him, you two are going to be punished."
"Sorry."
Despite the two apologizing to Alex, he started to have a bad feeling as they bowed down again.
"Come on, Alex, I know you have a vagina too. Don't you want to see how it is done?"
Sophia's words broke Alex's last defense in his head as he couldn't resist seeing it happen before his eyes.
"Ahem, you three sit over here and take off your pants and underwear, okay? I don't want any of you to ask me about this ever again."
All three of them nodded in agreement as they sat down on the bed before taking off their pants.
Except for Alex, who hesitated as his cock was already rock hard down below.
"Alex?" Mary asked as she and Sophia both looked back to Alex, who was still standing in place.
After a short fight inside his head, Alex's lower body took control over his mind as he took off his pants and underwear before sitting down.
Both girls looked at his erect cock for a second before turning their attention back to Katherine.
Meanwhile, Katherine's face looked a little embarrassed before calming herself back down.
"So to masturbate, you need to get into the right mood first... Like thinking of someone you love."
"Mom, do you think of Dad when that happens?" Sophia curiously asked.
Katherine blushed, but she nodded in agreement as she began to take off her pants.
Suddenly, Alex felt a little jealous of his own dad before realizing how stupid he was for thinking that.
After Katherine took off her underwear, she slowly moved her right hand towards her crotch.
"First, you want to spread your leg a little, then depending on your body, you move your finger to open the cover to find something bumpy."
As Katherine slowly opened her cover, a small little bump appeared that made her moan out a little as soon as she rubbed it.
Both Sophia and Mary began to reach their hands down, copying the same motion as they found their clitoris.
"Hm!"
The two of them both moaned out at the same time, feeling a surge of pleasure hitting their mind before stopping.
"Alex, you don't want to try it?" Katherine asked, stopping as she looked over to him.
"I... I don't know."
"Girl's genitalia feels a lot more intense. You sure you don't want to try it?"
Alex hesitated but eventually decided to try it out as he moved his hand further down, reaching right where his vagina was located.
As he gently lifted his testicle in one hand and spread his labia open with the other, all three of the girls could see his clitoris and the entire vagina.
"Hm!"
Alex let out a moan as he rubbed it a little, feeling the same pleasure that the other three girls felt.
It was much less intense than playing with his cock, but the pleasure was much more constant and steady.
"Just keep exploring your body. Try to touch around the clitoris to see if your body feels a little different."
As all three of them followed Katherien's instructions, they soon found their own unique spot, which made it even more pleasurable.
"Now, you might noticed your finger is a little wet. That's the lubricant that your body naturally produces."
Katherine explained as she was starting to help the three by moving their finger up and down, then side to side against their clitoris.