There’s crazy, and then there’s posing as your autistic twin sister who doesn’t exist crazy.

Cops say that’s exactly what Rachel Childs, of Pearland, Texas, did earlier this month in an attempt to sexually assault a private caregiver.

According to local police, the 29-year-old solicited the individual “under the pretense of caring Ms. Childs’ twin sister” who was described as having autism.

The unidentified worker was asked to arrive at the 29-year-old’s home “at a specific time” but told that she — Childs — would not be present.

Cops say the caregiver was given further instructions to “take the autistic twin sister to her home and then return her the next morning.” Childs allegedly claimed she would arrive a short time later.

“During the stay at the caregiver’s home, the ‘sister’ engaged in sexually oriented conduct toward the caregiver who became suspicious as her behavior did not reflect that of someone who was autistic,” said Pearland Police in a statement Thursday. “As a result, the caregiver investigated and determined that Ms. Childs was an only child and contacted the Pearland Police Department.”

Cops launched an investigation and quickly found out that Childs — who isn’t autistic — was trying to pull of an elaborate hoax “for sexual gratification” and was actually the “sister” that the caregiver was hired to take care of. She turned herself in after the Jan. 3 incident, but now cops are worried she may have tricked others.

“The Pearland Police Department believe there might be additional persons whom were similarly deceived by Ms. Childs,” officials said.

Anyone with information has been asked to contact Pearland detectives.