A Queensland woman who sent explicit photos of her young daughter to a lover has again avoided jail after an appeal of her sentence.

The woman was 41 when she was handed a three-year suspended sentence and probation last year for sending up to 19 photos of her 12-year-old daughter to a man with whom she was having an affair.

Earlier this month, then Queensland attorney-general Jarrod Bleijie appealed for a harsher sentence.

The Court of Appeal upheld on Tuesday the sentencing judge's decision not to send the woman to jail, but extended her suspended sentence from three years to five.

The sentence is only served if the woman reoffends.