Phone sex

Respected scholars, as-salamu `alaykum.If a man and a woman, while having phone sex, address each other as husband and wife and they actually mean it, will it amount to marriage? Even during the normal course of telephone conversations they occasionally call each other husband and wife. Does it mean they are married or it just an over emotional sentiment? Is marriage solemnized when a man tells a woman that she is his wife and the wife says she is?Jazakum Allahu Khayran.