Perhaps, but I don't think so. She *really* wanted to interrogate her, and was surprised (and, I think disappointed) when Jillian wanted to do things "the easy way". Also, she used mind control on the guard, when she probably could have done things differently (for example, she could have assigned a zombie to guard the door).
I think she's trying to keep people from realizing that she is as much a ... thinkomancer? as a croakamancer. Mind control works better when people aren't aware you're doing it.
Maybe. Tool is pretty easy to manipulate. I think it's likely she knew before he opened his mouth exactly what sort of response she'd get to "we can do it, but it will cost every last schmucker you have in the treasury."When she got the idea to summon the perfect warlord, she clearly expected Stanley to pay for the full package