Deepak Dhankar deceived the woman into believing he was a muscular, blond-haired Caucasian man named "Jamie", during exchanges on dating website, a court in Melbourne heard.
He engaged in sexual activity with her only on the condition she kept her eyes closed, The Age reported.
Prosecutor Russ Hammill said the woman kept her eyes closed while with the man, and that it was only when they were in the shower -- when one of the woman's children stirred in bed -- that she found that he wasn't the blond-haired Caucasian.
Hammill said once the woman realised who she was actually with, she became fearful for her safety and that of her children, and decided to "play along" until he left her home.
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Afterwards, she confronted him over the deception, at which Dhankar pleaded with her not to report him to the police, the court heard.
The woman said she had been humiliated, angered, and saddened by the ordeal, which had also left her suffering anxiety and panic attacks.