Coronation Street has aired another big twist in Michael Bailey (Ryan Russell) and Grace Vickers' (Kate Spencer) story, as Grace finally confessed the whole truth to Michael.

Michael was stunned to discover recently that Grace has been lying about little Tianna being their daughter, a fact that was only uncovered when he took Tianna without Grace's knowledge and her real parents called the police. Devastated Michael then decided he wanted nothing more to do with Grace.

In tonight's episode (October 2), Michael confessed to his dad Ed (Trevor Michael Georges) that he was really struggling with his emotions after Grace's bombshell, explaining that during the time they spent together Tianna had been his daughter and saying that he felt like "such a mug".

Suddenly, Grace turned up at the door and asked Michael if they could talk alone, which Michael agreed to despite facing Ed's wrath.

Grace went on to explain everything, confessing that Tianna is her best friend's daughter and that she used to nanny for her, which is why Michael had seen them together.

Admitting that she had let things get "out of hand", Grace said that she had wanted to make Michael feel some of the hurt she did, saying that "everything went wrong after we split up and I blamed you".

Grace revealed to Michael that she had sadly lost the baby she had been expecting with him at the time they split and that she had become swept up in the lie about Tianna after her chance encounter with Michael.

She said that she now felt guilty about scamming Michael, confessing that she wants them to start again and make another go of their relationship.

"It's up to you. We can still go to Spain before the police pick me up ?we can have a family of our own," she said.

After a moment of contemplation, Michael agreed to escape with Grace and headed upstairs to pack his bags, leaving Grace alone in the living room.

There was then a surprising twist in the tale as Grace pulled a pregnancy test out of her handbag and smiled at it.

But events took another turn when, just as Grace was preparing to book her and Michael flights to Spain, there was a knock at the door and policeman Craig Tinker (Colson Smith) walked in to arrest Grace for fraud by false representation after receiving a call from Michael.

Michael wasn't interested in Grace's explanations, saying: "I don't know if I'll ever be the same."

And just as Grace said that she had something to tell Michael, he shouted that he didn't want to hear anything she had to say and that their relationship is over for good.

As Craig took Grace away, Michael remained in the dark about her pregnancy secret ? but will he find out about the baby? And will it change how he feels about Grace?

Digital Spy