Thank you for writing to us.

At this point in time, there is only a way to show two different sets of parents, one that is biological, and one that is adoptive.

Please see the following post in our FAQ regarding this:

http://www.myheritage.com/help/2008/10/how-do-i-add-adopted-or-step-children-in-family-tree-builder/

Best Regards,

Esther / MyHeritage Team