This isn't the main focus, but it's odd that she asks him if she can cum. More common for men to do this as they often lose their desire or ability to perform afterward...
Or rather, stories like this are why it's impossible to ban "porn" without also banning works that genuinely express something about the human condition. A lesson that has to be relearned constantly, it seems.
Shes 100% fucking all the guys in the office. The ugly bastard will blackmail her, but what will break Gomi is the knowledge that she doesnt care about him, and already done the same thing to everyone else in the workplace.