Here is my summary
Sandra had someone send a text message to Lynda telling her her mum needed to see her Cindy in the village. Lynda had packed her bags and left with Cindy and would not be back till Monday. Sandra put a call to Kenny to tell him the house was on fire, she actually started a little fire in her bedroom to make it believable. She put on her sexiest dress and waited for Kenny. When Kenny arrived, he immediately put out the fire and just as he was about to return to work. Sandra told him she was leaving the house for good. She asked Kenny to at least have one drink with her, he obliged, she took the wine which she had already poisoned and gave it to Kenny, Just as he was about to drink it, his phone rang. The wine spilled and Sandra rushed to the kitchen to get a napkin. When Kenny ended the call, he heard a loud bang in the kitchen, Sandra had slipped and hit her head on the kitchen tile. Just before she died, she confessed all her wrong to Kenny and asked for forgiveness.
Thank you for your valid summary.