<Li> Rita Morgan ( played by Heather McComb ) is Gretchen 's sister . She is introduced in `` Blow Out '' . Although she is taking care of Emily ( Regan Licciardello ) , it is revealed that Gretchen is Emily 's biological mother . Rita and Emily are later taken hostage by T - Bag and Self , and Rita is the catalyst of T - Bag 's decision to seek redemption when she convinces him not to kill Ralph Becker . </Li>
<Li> Rita Morgan ( played by Heather McComb ) is Gretchen 's sister . She is introduced in `` Blow Out '' . Although she is taking care of Emily ( Regan Licciardello ) , it is revealed that Gretchen is Emily 's biological mother . Rita and Emily are later taken hostage by T - Bag and Self , and Rita is the catalyst of T - Bag 's decision to seek redemption when she convinces him not to kill Ralph Becker . </Li>
who plays gretchen 's sister in prison break
who plays gretchen 's sister in prison break
Heather McComb
Heather McComb