Melanie Battersby says social services and police did what they could within the powers that they had as they sought to make contact with Kenneth Battersby, 60, who died of a heart attack.
The two-year-old was found dead cuddling his father Kenneth s leg at their Skegness home earlier this month after the 60-year-old was believed to have suffered a heart attack around New Year.
Chris Philp said it was vital that investigations uncover what happened after the heartbreaking tragedy which saw the two-year-old found dead curled up at the knees of his father Kenneth.