Anyone can so, the question is whether or not they can win. In the case you outline before your boyfriend would have any legal right to your son he would have to establish "standing" by being either the adaptive or biological parent. Is that does not appear to be the case I would suspect you will lose in your plans to place your son in the temporary custody of your sister should be attainable. I would suggest that you see an attorney regarding the arrangements and to make it all legal, including how your release from jail or prison will be treated.
Answered on Aug 19th, 2015 at 3:52 PM