1. WIY
Member
Halachafortoday says
“2) The only permissible relatives for a person to hug and kiss are a mother/father, son/daughter, grandson/granddaughter according to some Poskim and a sister below the age of 3 (or 7 according to the Chazon Ish). (See Aruch Hashulchan Even HaEzer Siman 21:10)
All other relatives (Uncles/Aunts, Sisters in law/brothers in law, cousins etc.) may not be touched, kissed or hugged, and all the Halachos of other females apply to them.”
Seems to me the quoted halacha above talks about hugging and kissing not about touching. I know that a very chosuva rav in the midwest that says touching is technicelly permissable on a blood related niece and singing is not assur at all as it is a chumra based on touching