Agent Tasha comes from really far away, carrying some vital documents with her. That was her task, and once the documents were delivered, she asks for a glass of water; when she is not seen, she puts some powder in the glass and drinks it.
When the guy asks if she needs any kind of delivery receipt she tells him that she will be fine, she is going to die as she has just poisoned the drink. Some people will come around to pick up her body later, and the body itself will be the proof of delivery. Also, she tells him not to be afraid, he will be fine, everything went as planned.
So the guy starts having a look at the documents, trying to distract himself, as beautiful Tasha falls into a deadly sleep. He can't actually concentrate as he has made plans. In fact, pretty soon he checks her out and realizes she's gone. he will have some time before the body is picked up, so...
He strips the body naked, gropes these massive tits of hers, worships her feet. He gives himself a footjob and cums all over her freshly dead soles.