Is a wife forbidden to her husband if he says to her, "If you carry me beautiful in this matter, then you are forbidden to me," after she says, "I have pleased you this morning"?

Your question is not entirely clear, but what we understand is that you forbade your wife to yourself by saying: "She is forbidden to you if she boasts to you about what she said." In this case, a man's forbidding his wife depends on his intention: did he intend ẓihār (a pre-Islamic form of divorce), or divorce, or merely an oath?

Since you made the prohibition conditional on your wife's action, the determining factor is her statement. Therefore, she can be asked whether she said it boastfully or not, and based on that, it will be determined whether the oath was broken.

We advise you to consult a scholar to clarify your intention regarding the prohibition and to ask your wife about her intention, and then he will issue a fatwa to you. We also caution against using words of divorce and prohibition to solve marital problems, due to the potential regret that may result from it.