Earlier this month, ITV confirmed that Weatherfield favourite Tina McIntyre will successfully become pregnant with Gary Windass's baby to give him and Izzy a child in exchange for money.
Despite the protests of boyfriend Tommy Duckworth, Tina went ahead with the plan in order to pay off heavy debts incurred by Terry, Tommy's wicked father.
Speaking to ITV.com about the length of the plot, Keegan revealed: "This storyline has many months to run and it is going to be so interesting to play.
"I am thrilled to be given a storyline that will be a real talking point. It is an important issue which hasn't really been tackled before. I want to do it justice. It will be interesting to see if Tommy sticks around.
"I love working with Chris [Fountain] so I hope he does. And it is nice to be working with different people like Mikey [North] and Cherylee [Houston]."
Her comments suggest that Tina will commit to keeping Gary and Izzy's baby and avoid an abortion.
Doubting Tina's confidence in the surrogacy, the actress added: "I think she is being a bit stubborn and bloody minded. It is an amazing selfless thing to do but it seems she just thinks it is nine months and it will be over.
"Having not had a baby herself she has no idea how she will feel once she is pregnant."
Coronation Street's latest twist in Tommy and Tina's story will play out next week, starting from Monday, October 29's 7.30pm episode on ITV1.