IS IT PERMITTED TO KISS MY GRANDMOTHER?
Answer:
Yes, it is absolutely permitted according to halachah.
A grandmother has the same status as a father and mother, with whom there is no concern for arayos.
Best wishes.
Sources:
See Chelkas Mechokek, Even HaEzer 21:10; Beis Shmuel 14. See also Iggros Moshe, Even HaEzer 1:60 concerning a grandfather kissing his son’s daughter (rather than daughter’s daughter), but most authorities rule that there is no difference, and this is the prevailing custom (see Aruch HaShulchan 21:10; Tzitz Eliezer 6:40-20; Shearim Metzuyanim BeHalachah 152:16). This debate concerns a grandfather kissing granddaughters, and not the other way.