Let's parse this.

Painstaking minute after minute passed until he heard the familiar muffled thunk of the front door, devoid of any noise, an eerie silence had overwhelmed the house. The background hum of the innerworkings of their home was put to rest by the silence.

Presumably, Casey quietly walks to the front door. Someone then opens the door, and closes it. The lack of confrontation suggests that Casey and Susan were not together when the door opened and closed. If Susan opened it when Casey was there, Drew would've heard something. More likely, Casey went outside before Susan walked away from her car. This puts the confrontation outside.

That was until an ear-splitting screech rang out.

One of them was utterly terrified and in mortal danger. I assume that there's only one shrinker here, and Casey has it. It's also worth noting that whoever screamed was big enough for Drew to hear them. That implies that nobody was actually shrunk when a killing strike was made. But how do you terrify someone with mortal danger, when they haven't been reduced in size?

Closely followed by a thunderous quake

Would a stomp from Casey or Susan, at their usual size, be described this way? I don't think so. One of them would have to be much larger than normal to shake the house. But how large would one have to be to stomp on the other? For a foot to be large enough to cover and crush a person who's 24 feet tall, the foot's owner would have be, by my estimate, 160 feet tall.

I eagerly await the explanation in the next chapter.

As time goes on, it looks like Taylor is enjoying Austin’s ability to tolerate her stench and hygiene. It’s like she found the perfect roomate. Although, with Drew, she could always tease and mess with him since he didn’t like her physically pushing  him around. Lol. 

That flashback memory with Taylor rolling onto Drew was awesome. It was playful, a bit suggestive and is exactly what Taylor would do. 

Then we get Casey and wow, we quickly get a cliffhanger. The scream could mean anything, but that “thunderous quake”…. now that’s interesting.

This makes me wonder if someone actually grew. Did get hit by the shrink ray, but it actually grew her? And then maybe she stepped onto her mom’s car? Perhaps the step was what caused that quake feeling. 

Then again, Drew is tiny, so anything could be considered a quake. Man, I really don’t know what happened, but this is one heck of a cliffhanger.

I can’t wait for the next chapter!