If you're shy, online learning will give you a chance to improve your photography skills in a non-threatening environment.
This puts a stop to the nursing attempts in a non-threatening way, and should distract her from it.
This will allow the kitten to get used to the sounds and smells of a new home in a non-threatening area and will also help train your new pet about where his litter is located.
Ask your colleagues, in a very discreet and non threatening way, to stop.
This is a great opportunity to let him know how you feel, but in a way that is non threatening.