What happens next?

How to clean coffee stains
Blot the coffee stain immediately.
If the stain is still damp, blot with paper towels or tissue. Use a blotting, up-and-down lifting motion to soak up the coffee.
Do not rub the paper towel from side to side because this may spread the stain. Use white paper towels because towels with patterns could leak dye onto the fabric and create even worse stains.