Cibeles on "Adding php code into Contact Forms 7"

Good morning,

I've got a problem I can not solve and I hope you can help me out.

I am using contact forms 7 and I need to show some more fields (also generated with same plugin) depending if a checkbox is checked or not.

So thing is "Do you like tea?" and if checked print some fields to get more details, after that, the submit button has to send me the fields I printed before this answer and the fields after it.

Is this feasible? Can I add php to contact form 7?

Thanks