Can I kiss or hug my friend's wife who is like a sister to me?

My wife and I have a family friend (consisting of husband, wife and two kids). My relationship with my friend's wife is very precious and I have no intention of sin. We are like sister and brother to each other. And this is known by my wife and her husband. Is it permissible for us to hug and kiss each other on forehead? Can we ask Allah to continue this same relationship in jannah as well?