Chelangat maintains jailing more women like her might not be effective in winning the war against FGM. The battle, she says, might must start with winning minds.
As long as society continues to quietly frown on women who have not faced the cut, more girls like her might end up in jail - for succumbing to the intense pressure.
“The name-calling and stigmatisation in our community has led to several girls leading lonely lives,” she says.
Somewhere on the manicured lawns of the prison, Janet Chelenga, 28, and her husband, Paul Kiplangat, share a meal.
Ms Chelenga has been away from her husband for 15 months now. She was arrested alongside Chelangat for a similar crime - undergoing FGM.
She did not inform her husband of 15 years of her decision to face the knife. Instead, she chose to run away from her matrimonial home to go through the process, planning to return after she had healed.
But Chelenga never returned home; she ended up as a State guest at Kilgoris Police Station and was subsequently arraigned and handed a three-year jail sentence.
To date, she says the pain she experienced was not worth her freedom and vows that she will not allow any of her daughters to be circumcised.
But that might depend on whether her daughters will be able to withstand the intense pressure from those who quietly undergo the rite. The same pressure that Chelenga succumbed to.
Married at 13 years, she never knew peace for the 15 years of her marriage.
“I was the talk of my village. Other married women gossiped about me. I avoided social gatherings because of the insults," she says.
Chelenga's husband now says he would have protected her if he had known the kind of pressure she was going through. He has since forgiven her, he says.
But he has to face their children every day to explain why their mother is in jail.
“They keep asking me why their mother is living away from home and in police custody,” he says.
Grace Sitienei, 65, is also a resident of the prison. She is serving three years for administering the cut on the two women for between Sh1,000 and Sh2,000.
Ms Sitienei cannot speak Kiswahili but through an interpreter, she says she grew up believing that FGM made a girl pure. Her five daughters have all undergone the cut.
There are at least 20 women at Kisii Women's Prison, jailed for FGM-related cases. They have one common message: We have learnt our lesson; release us so we can take the message to our daughters.
“I am ready to talk to mothers and young girls to end this custom,” says Sitienei.