I'd second the comment about the comic. yes, there is one, but that is more conceptual and does not really write a story how it happens, more the idea of the officer
It's like she can't believe how big and fat the cock is that she's about to take into her mouth -- looks like she's afraid she might not be able to accommodate its girth but is also in the throes of such intensely worshipful rapture and overcome with a strong and irresistible desire to feel it fill her mouth and throat 'til she closes her lips around the base of its shaft and tries to lick his balls as an explosion of thick cum erupts from the enormous head and splashes in her stomach all while she maintains eye contact with her well-endowed paramour the whole time!!
It was mainly an aesthetic choice here. There definitely is a servant hierarchy but it's not so strict. The three of them are basically on the same level with their chunky collars and menial duties.
The two maids act superior to Alison because she is shorter, younger and newer. They're a little taken aback at her ability to "climb the ranks" so quickly, but they take it in stride.
The expressions on both faces are priceless. Also, you just -know- that her first reaction was to reach up and stop her top from falling, only to realize what had happened and compounding her shock and embarrassment. Great work, as always; hope we get to see her and the demon in something more solid eventually.