Supergirl is bored (and drunk). She just came to planet Earth after a long party weekend on another planet, she just heard about the Justice Gang and she is quite curious about this, she thinks that having super powered friends to party is really cool and she wants to convince them to let her join the group. She is (kind of) sober enough to not break everything around her but she is not aware of how unpolite she acts. She enters to the Hall of Justice, she sits on the nearer table trying to look friendly and confident, but she takes off her boots and puts her feet on the table to air her feet, she doesn't realize that her feet are quite sweaty from all the partying. Hawkgirl, as a fan of foot fetish, decides to take care of this unexpected visit. She sits on the table too to talk to the Kryptonian and maybe she will be able to touch those sweaty feet somehow. Hawkgirl playing along with Supergirl's drunk frindeliness playfully removes Supergirl wet socks and convinces the Kryptonian to stuff her mouth with those, she also manages to touch those sweaty feet and write on those soles, the pen will never harm Supergirl's skin but it tickles either way.