Yes, it is possible as family visit visa (6mos.)

example: Sis in law...

1-Authenticated Marriage Contract w/ your wife.
2-Wife's birth certificate. (verification of their
family names that is in common)
3-Passport copy of your wife.
4-Sis in law birth certificate.(same reasons)
5-Passport copy of sis in law.

And of course your identification and supporting documents.