I would actually jump it to four or even five stars, despite my not great fondness for "balloons" and the look of some characters, if it wasn't for what below:
1) If the lust is up, it makes no sense that when doing the "fights" she has the same resistance as normal;
2) When you have no mind control, it is ok that in the fight for the mind control her dice can go 1-100, but it makes no sense that when the mind control is up, so she has less resistance, her dices still go 1-100, if you have more mind control, it is because she is under your influence, so she has less resistance;
3) No matter what you do, if you get successful, you get 1% mind control, but it makes no sense, if you get tongue kissing is one thing, if you get her a full orgasm, should be another;
3) after the middle training becomes available, starts a big bug, if you do the easy training, even if you are successful, most often it does not even try to calculate whether there is a mind effect, and it justs throw you back to the choice menu, but without increasing the mind control (because he did not even try to do that check);
4) If you try to ambush the black widow, every time she escapes, she increases her stats, while the minions never do it, unless by chance they end up capturing her.
5) If you capture Black Widow, you can "do stuff"
to keep from escaping and getting information to seel, but no matter how much you do it, she never really gets under control - it is true that she is supposed to be trained to resist that (more than WW), but still, seems awkard.
If the above was corrected, it would certainly be a 4 or a 5 for me, and if then you could capture someone more, it would be even more true (though 30 eur a month, is still too steep as price).