SG1 tries to hire slayers

[ladyhatshepsut.livejournal.com]

 Looking for a story where Riley goes with SG1 as liaison to the "special girls school".  I think they want to hire slayers for the Stargate.  When they get to the main building, which I think used to be a mansion, Dawn greets Riley happily with a hug.  The team is amused when Riley starts to quietly panic as he tries to tell his body that this warm woman's body, pressed against him, with breasts and curves is Buffy's little sister.  I also remember O'Neill noting the thickness of the walls and the hidden moat for protection.