Adjective : unmindful of obligations.    From Dictionary.com. 

None of the purity retains, and these songs are just entertaining beats and noise that you might unmindfully enjoy and then forget.    From Wordnik.com.  [Top Stories - Google News] Reference

His pertinent reminder that the earth on which we trod, unmindfully, is the source of everything we need to survive and all the things we seek to enjoy.    From Wordnik.com. Reference

It may also have been possible that this clearly overage officer, who should have no business being a field operative, may have unmindfully shot at an unarmed citizen.    From Wordnik.com.  [AllAfrica News: Latest] Reference

I unmindfully placed it in my lips.    From Wordnik.com.  [Letter from W. Lyle Bryan to his mother, November 15, 1908] Reference

She held the sticky, chubby hands unmindfully.    From Wordnik.com.  [Otherwise Phyllis] Reference