Not much happened, but I can see how it's setting up for the next chapter. I don't know if you've already decided on how you're going to do the next chapter, but here are some ideas that might work.

You could have the retrievers wait outside until Alex comes and puts the laundry out on a clothesline. One of the retrievers could then sneak in to a pair of Alex's panties and wait for her to bring them in again. Several hours could pass and Alex could come back to get the clothes, bringing the retriever in in the process. You could then use the excuse that Alex needs to take a shower and brings in a set of clothes to change into. One of those clothes could be the panties that the retriever hid in.

Afterwards, Alex could change into her clothes and not notice the retriever. The retriever could then wait for an opportunity to strike and "infiltrate" Alex's body to defeat her from the inside. I'll leave it to you to decide where she infiltrates from since there are so many options, but you could use this plot line to progress your story.

Loved the chapter and can't wait for the next one.