Calling a woman wearing the niqaab a "ninja"

Q: If someone (Muslim) calls a niqabi a "ninja" (not in a derogatory way or to mock niqab, nor to make fun of the person for wearing niqab), will it be kufr? 

What if the niqabi didn't think much of it and just passed it over as a joke, because she believes that the person was just joking and not trying to degrade her or something. 

Basically, a ninja can be considered good or bad, but it depends on what the ninja does (apparently).

Muslim lawyer doing work for a gay or lesbian

Q: 

1. A lesbian woman approaches a Muslim notary to draw up an Antenuptial contract for a civil union with another woman. 

2. A person who is openly gay/lesbian approaches a Muslim lawyer to do work for them. The work doesn't have to do with the client being gay/lesbian. It is normal legal work. 

In either of these scenarios, is it permissible for the notary/lawyer to do the work?