Los Angeles - Allegations of incest have regularly plagued Stevland Hardaway Morris ever since the 1967 Tamla Motown hit 'I was made to love her' co-written with his mother Lula Mae Hardaway.
This weekend those smears are back in the news amid a sordid $5 million extortion plot allegedly brokered by Wonder's nephew.
Alpha Walker, 38, and his girlfriend Tamara Diaz stand accused of a botched blackmail attempt that subsequently lowered the disclosure tarrif to a paltry ten thousand bucks.
Prosecutors reckon too much malicious reading in between the lines saw Walker and Diaz interpret Wonder lyrics as love songs charting the progress of a lifelong Oedipus-like fling.
Smash hits from the 1970s like 'Signed, Sealed, Delivered I'm Yours', 'Heaven Help Us All', 'Superwoman (Where Were You When I Needed You)' and the tell-tale 'Superstition' have all been cited as examples in the scam.
Commenting on the Los Angeles court case iconic celebwatch website LA FagHagSlagMag.con sources said on Saturday there wasn't a grain of truth in any of the lurid allegations.
Wonder is a highly successful entertainer with seven children from two marriages and various relationships.
None of his blood relatives has ever actually - or successfully - pointed the incest finger at the talented singer who blames a previous, ugly former Motown rumor mill for trying to discredit him in a feud over royalties.
His beautiful daughter Aisha Morris was the inspiration behind the chart-topping single 'Isn't She Lovely'.
Like her famous dad she too sang in her local church's gospel choir during a regular all-American childhood, something the judge will doubtlessly hear.
Expect a packed courtroom on May 16th.