Adhesive - Tile Advice

[Bluemarky]

Got a very small job next week and it’s really small ! Just a bathroom window sill to be tiled and the top of boxing in at the end of bath, literally 8 tiles with 4 cuts ! my question is can rapid set adhesive be made to set faster with warm water as don’t want to be hanging around for 2 hours to grout it , the home owner is selling the house so has estate agents coming to photograph the property next morning.