I said to my wife: "You are forbidden to me in bed as is my sister." What is the ruling of Sharia on this?

Man Forbidding himself for his Betrothed before Conclusion of Marriage Contract is Inconsiderable

If a man says to his betrothed, before conclusion of their marriage contract: "You are forbidden for me just as my mother, sisters and daughters are forbidden for me as far as the sexual relation is concerned." Does this make her forbidden for me in marriage?