Your sentence would be quite unusual in English, rather unlikely.
First, your previous conversation would have had to establish that there was more than one brother and that one of them was married.
Second, it would have to be clear from the context of your conversation how it is that you "have" this particular married person.
For example: "I have a sister, a bachelor brother, and a married brother. Next week my sister is staying with me, and the week after that I have the married brother."