Brother/sister mind control involving working at a museum

[upstreamallday]

I can't remember the name or author, but this story involved a young man who got a job at a museum, I think in London, via his father's influence.

His sister moves in with him and gets a lower tier job with him. She acquires (I think steals) an object (I think from the museum) and slowly starts giving him blowjobs, etc.

There's a scene where she is under his desk while his boss is talking to him about how she isn't really that qualified for her job.

 

[Mandlovu]

"A Medallion and a Sister" by itscalledhazing.
It was removed, but used to be found at www.literotica.com/s/a-medallion-and-a-sister

 

[upstreamallday]

"A Medallion and a Sister" by itscalledhazing.
It was removed, but used to be found at www.literotica.com/s/a-medallion-and-a-sister

Damn, I'm impressed! Thank you!