A Missouri woman confessed to starting a fire at a family home so that her sibling wouldn’t make money from its eventual sale, authorities say — and an hour before allegedly lighting the blaze, she is said to have called 911 inquiring about how to acquire a burn permit for the house.

Cheryl Gibson is in the Greene County Jail on a charge of second-degree arson. A probable cause statement from the Springfield Fire Department provides details into authorities’ investigation.

On Monday, Gibson was “involved in a family dispute” with an unnamed sibling concerning “their late father’s residence” at an undisclosed address in Springfield. The court document states both people “have a financial interest in the property”

Before the fire, Gibson reportedly sent a message to this sibling declaring her intention to “burn the place down.” She had also, earlier in the day, reportedly been on the phone with this sibling’s husband “requesting help” when the sibling interrupted the conversation, “which upset Gibson.”

At about 6 p.m., an hour before the fire started, Gibson “called 911 requesting information on how to obtain a burn permit for the house,” the affidavit says.

Roughly an hour later, Gibson purposefully set the home ablaze, the document states. She is said to have “poured gasoline throughout the house and ignited it using a book of matches, motivated by her desire to prevent [her sibling] from obtaining any financial gain from the sale of the property.”

The suspect, who allegedly called 911 to report the fire, did not appear to have any misgivings about the crime, according to the affidavit.

“During this recorded call, Gibson admitted that she had poured gasoline throughout the house and ignited it with matches,” the document says. She apparently remained on the property when emergency responders arrived and was arrested.

After being read her Miranda rights, Gibson apparently spoke with authorities some more.

“She admitted to starting the fire and explained her motive for doing so was to prevent [the sibling] from obtaining financial benefit from the property sale,” the probable cause statement says. “Gibson acknowledged that the house is insured but stated she did not plan to file a claim.”

The fire marshal investigated the fire and found its origin was “consistent” with Gibson’s statements about what she had done. A used matchbook was taken from the home, and it was “identical” to an unused matchbook she had in her possession when she was arrested, the document added.

Also found inside the house – near the back door – was “a nearly empty plastic gas can.” An “unknown clear liquid, which had the odor characteristics of gasoline” was also recovered from the house and submitted for analysis.

The affidavit added that Gibson said that when she started the fire, “the front door slammed shut, which she believed prevented the fire from getting larger and causing more extensive damage” — although there was nevertheless “fire and smoke damage throughout most of the rooms.”

According to court documents, Gibson has lived in a separate house on the same property as the house, and she “maintains continued access to both the target property” and the sibling, who is Gibson’s “only apparent community tie.”

The affidavit warns against Gibson being released on bond after her arrest.

“Most concerning, Gibson expressed disappointment that the front door closing limited the fire’s damage and demonstrated understanding of how this affected her results,” the document says, adding officials’ concerns that Gibson “will attempt to burn the house again using improved methods to cause greater damage.”

Gibson was jailed on a $5,000 surety bond. Her next court date is scheduled for Wednesday, Aug. 6.