well you need to do that one then after that you just kind of have to hangout with him.
At some point you will be ask to help with an experiment involving hypnovisors. After that you can buy them later.
Speaking of that how long do you have to have those panties on in order to count it as complete?
once you're able to see who's banging you thru the portals, you should go look around the prison for an interaction where you can get the other end of the portal back
Talk to alex before doing what naleks said first. Then go looking.