Disclaimer before e-mail generation plugin

Hello,

I have e-mail links on a WordPress 4.0 website which is running the Twenty Fourteen theme, but will eventually run the Karma theme when I’ve created enough content and images to merit the change. It generates standard e-mail to my address and the addresses of others at my office, which is hidden using Till Kruss’ E-mail Address Encoder Plugin (thanks, Till!), so a user of the website sees a button that says “e-mail” and does not see the e-mail address until the e-mail is generated. I would like for that button to instead open a pop up disclaimer that says that no relationship or obligation is formed by sending an e-mail, that no relationship is created until agreement is reached by which engagement for services is initiated, and perhaps other terms of use, with a yes or no button in the pop up window, and clicking yes would close the pop up window and generate the e-mail and clicking no would close the pop up window. I’d like it even better if the “yes” button also required a simple captcha. I would like to retain the benefit of Till’s E-mail Address Encoder in the process. I’ve searched using all queries that come to mind, but don’t find such a plugin, so I now ask: Is there such a plugin for WordPress?