Medusa was sure that if Coulter had to kill her or do any harm to her, then he would have already done it. The woman knew there was no point in continuing to lie now. Thus she dropped her pretence and came clean to him, but the succubus kept herself mysterious as she did not want Coulter to know more than he should.
"Deal? Let me ask you too since you are still persistent to extort anything from us."
Medusa paused to see his expressions which immediately changed after the woman gestured to Malcolm. She was sure that Coulter grew cautious of them but it did not stop him from poking information.
The succubus could also guess that the man had not forwarded any information to the higher ups. It was obvious that he wanted to deal with both of them all by himself. And it also raised the curiosity regarding why he would do that. It could potentially risk his job and his own safety too but for some reason he was not thinking about all that shit.