Third Party Threat

Is third-party torture or threat (i.e. capturing a terrorist's spouse and threatening to kill or torture the spouse) more or less morally justifiable than direct torture?

I think that, if done correctly, a third-party aspect of torture could prove very useful and morally justifiable in some circumstances. I think that it would be wrong to capture the spouse, given that it is against the spouse's will and then threaten to kill or torture the spouse. The spouse, in this scenario, had nothing to do with the the crime, as such, we are not justified in punishing the spouse. However, I think we could consider talking to the wife to persuade her to help in saving many lives, along with the promise that she will return unharmed and that, as compensation for her time, and for the psychological trauma that the tortured person would experience, they would somehow be rewarded.