She said to her husband: The limit of Allah is between me and you
Question

                During Ramadan there was an argument between me and my husband, and I said to him: The limit of Allah is between us, but I did not specify anything in particular. What is the expiation for that? Is it regarded as tahreem (making intimacy haraam) between husband and wife?.
Praise be to Allah.
      Talaaq and zihaar (kinds of divorce) are the hands of the 
      husband, not the wife. But if the wife declares her husband to be haraam 
      for her, that is an oath (yameen), so if the oath is broken she has to 
      offer expiation for breaking an oath. The oath is broken if he has 
      intercourse with her. 

    This has been discussed previously in the answer to question 
    no. 110010 

    Based on that, if what you meant when you said, The limit of 
    Allah is between us, was to make your husband haraam for you, then when the 
    oath was broken you have to offer expiation for breaking an oath, which is 
    to free a slave or to feed ten poor persons or to clothe them. The one who 
    is not able to do any of these has to fast for three days. 

    But if you did not intend to make your husband haraam for 
    you, then you do not have to do anything. 

    And Allah knows best.