20 Pa.C.S. § 2108

For purposes of inheritance by, from and through an adopted person he shall be considered the issue of his adopting parent or parents. An adopted person shall not be considered as continuing to be the child or issue of his natural parents except in distributing the estate of a natural kin, other than the natural parent, who has maintained a family relationship with the adopted person. If a natural parent shall have married the adopting parent, the adopted person for purposes of inheritance by, from and through him shall also be considered the issue of such natural parent.