On Monday, fans will see Colin Fishwick's elderly mother Joy (Doreen Mantle) arrive at the Stape house in a bid to seek answers about where her son could be.
Colin died during a heated confrontation with John and Charlotte Hoyle (Becky Hindley) back in the summer, prompting them to conceal his body at Underworld and scramble to cover up the truth.
Joy's shock appearance at the Stapes' comes on John's birthday, which is already an unhappy occasion for him due to continued harassment from Charlotte, his secret stalker.
Speaking to Corrie's official website, Hawley commented: "In the middle of all the problems and all the chaos, it's John's birthday. It's not really a day for him to be able to celebrate, but he starts off trying to enjoy his birthday a little bit.
"But events put paid to those celebrations very quickly. Colin's mum wants John to help her find Colin. This is not going to be easy as Colin is very close-by, but not very easy to reach in terms of having a chat with his mum!"
He then joked: "John has got himself embroiled in yet another sticky situation - now with Joy Fishwick. [This] is going to cause him no end of problems and tragedy over the coming week, [during] which he'll find hell on earth, and you'll all find very amusing because you're all very heartless in that way!"
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