Not necessarily wrong but perhaps not a wise choice at this time. I really couldn't say anything more than that because I don't know the details of your life. Just make sure you think of all the possible ways this could affect your life. If there are more negative outcomes than there are positive, then this may not be the right time to be having another child.
If you can support the children where they wont have any problems in life, then go for it. But please dont hurt the child or give it up for adoption or anything like that. As long as you have a good education.