One time I had a beard and then I shaved it off I joked to a freind that I shaved it off because my wife said she would kick me out of the house if I didn't shave it off( this was just a joke and she didn't say this) did this joke have any affect on the validity of my marraige

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.

This statement has no effect on the validity of your marriage but you are sinful for two reasons:

Firstly: shaving the beard, as this is forbidden as we clarified in Fataawa 81978 and 84474.

Secondly: telling a lie, which is forbidden and a grave major sin.

Therefore, you should take the initiative to repent. If a Muslim wants to joke with his friend, this is permissible but he should only speak the truth. Indeed, the Prophet used to joke but he would only speak the truth. Abu Hurayrah narrated that the Companions asked the Prophet : “You are joking with us?” He replied: “I only say that which is true.” [At-Tirmithi]

Allaah Knows best.