I think Jamie cheated most definitely and wanted her to be the perfect stay at home wife/mother, modelled on his own parents now old fashioned relationship dynamic.
However, i do believe there was a fling with Kevin and an expectation that they would be together as her marriage to Jamie was coming to an end.
For the year immediately after strictly Louise and Kevin were spending time together, even during and after he won his series with Stacey Dooley he takes Louise to his parents home up north and they spent the Christmas period with them which i think it’s a pretty serious couple thing to do.
The whole time this was going on it had become obvious Kevin had fallen for Stacey and it probably was reciprocated, but she was engaged.
The New Year comes and goes and before you know it Staceys engagement is said to be officially over, Kev and Stacey are pictured together and Louise is unfollowing Kevin and making sly digs at him via her Instagram account and then telling the media the two of them never speak and they were never close anyway.