Coronation Street fans think they have cracked what Kevin Webster could be hiding from Abi Franklin.
Following the death of her son, Seb, Abi has struggled with her severe grief.
Seb was murdered by evil Corey Brent in a hate crime killing.
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Following her quest for justice, Abi has been in turmoil, but this Christmas she has tried to remain upbeat for the sake of her stepson Jack Webster.
But Wednesday night's episode of the ITV soap saw Kevin make a huge secret discovery, after finding a hidden letter from late teen Seb, reports the Mirror.
Seb's former flame and flatmate Emma Brooker handed over some of his possessions she found in the flat, and amongst them was a letter.
Kevin was open-mouthed in shock as he came across it before reading the letter.
He soon confided in friend Tyrone Dobbs, but insisted Seb's mother Abi could never see the letter or know what it said.
Tyrone agreed to this and kept quiet about it, while viewers were kept in the dark over its contents and what it all meant.
While the truth will soon come out, viewers took to Twitter to speculate over what Seb had been hiding.
With Kevin fearing for Abi's welfare and suggesting the letter might send her over the edge, fans began predicting what he had found out.
One viewer questioned if it was linked to a secret child, or perhaps some bad news he never got to tell her before he died.
But some fans were convinced it might be good news, and could be linked to Abi's twins who live in Australia.
One fan said: "So either Seb’s left a note for Abi that had bad news on it or something like he’s a dad or he’s arranged a Christmas present for her."
Another tweeted: "Could Seb's letter be from Australia. Abi's other kids?" as a third wrote: "Wonder if Abi's twins are coming back for Christmas?"
Coronation Street airs Mondays, Wednesdays and Fridays at 7:30pm and 8:30pm on ITV.
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