This week Sinead is set to discover she only has weeks left to live.
Ahead of those scenes kicking off, Lisa posted a picture with her on-screen niece to Instagram.
She captioned the post: "Ready for this one to shine @katiexmcglynn #corrie #sinead #friendsforlife."
Fans rushed to comment on the post.
One wrote: "Lovely pic."
A second commented: "Lovely photo Lisa."
A third added: "Beautiful ladies and great actresses."
Katie's character Sinead was diagnosed with cervical cancer last year when she was pregnant with her son Bertie.
However, she put off having treatment so she could save her baby.
After prematurely giving birth to Bertie, she had chemotherapy.
Earlier this year she was told that her tumour had shrunk and the cancer showed no signs of spreading.
But a couple of weeks ago, as she prepared for her wedding to Daniel Osbourne, she discovered a lump on her neck.
As Sinead is told on Wednesday (October 9) those months are now only weeks as life-prolonging chemotherapy has not worked, she's faced with a bleak few weeks ahead.
With Sinead battling to come to terms with dying and leaving her loved ones behind, the upcoming scenes are set to be tearjerkers.
Coronation Street airs on Mondays, Wednesdays and Fridays at 7.30pm and 8.30pm on ITV.
Leave us a comment on our Facebook page @EntertainmentDailyFix and let us know what you think!