Will T be sitting in on the focus group? If so, I agree with tinyrabbit. At the very least, it might be awkward for you to have T there. Plus, there is the issue of dual relationships. Already you are feeling nervous about this because of your current mental health status and not wanting T to observe this in you. This should not be part of a focus group. If you really want to participate, could you ask T to recuse herself from the group?

Are you getting help for your current psychotic episode? I hope you have the help and support you need.