I may add some of my techniques "so that it flows better":

Since this story is supposed to be read on a screen, blank lines are welcome for structure and legibility:

Without turning to look at her, I braced myself and asked again:

“Like this?”

She thrust her boot forward...



If the speech/quotation is not endig with ! or ?, use a comma between it and the following part:

“Head to the floor slut,” she said.



Then there are special cases like this:

I wasn’t able to think for long before “It wasn’t a suggestion slut. Come here.".

Here, the speech takes over the function of an object in the frame sentence (please notice my second full stop behind the closing quotation marks) -- tricky. Let's try these:

I wasn’t able to think for long before...

“It wasn’t a suggestion slut. Come here."

... was thrown at me

or


I wasn’t able to think for long before [=before this]:

“It wasn’t a suggestion slut. Come here."

In my opinion, you can use a daring construction now and then when you have shown that you masters the correct/classic way.