When she was married in her 20s, she took three of her half-siblings out of institutionalised care to be with her family.
Now, Madam Atika takes care of two of them - Ms Alimah Mohammad Shariff, 64, and Mr Abdul Seram Mohammad Shariff, 58.
She says in Tamil: "My grandmother, who took care of me, told me, 'There's no one looking after them. When you're grown up and in a stable situation, take them back.'"
When a relative taking care of her mother died 15 years ago, Madam Atika also became her full-time caregiver.
Her half-brother, Mr Abdul Seram, spends the day at their home after attending a workshop at the voluntary welfare organisation Minds (Movement for the Intellectually Disabled of Singapore).
There, he learns to fold towels and other skills related to job training. At night, he returns to his own three-room Housing Board flat in Bishan.
His sister, Ms Alimah, goes to Xin Yuan Community Care three times a week for group exercise. She sometimes gets food rations such as rice and instant noodles from there.
Madam Patamah gets medical consultations at home provided by Happee Hearts Movement, a non-profit organisation that serves people with intellectual disabilities.
Madam Atika has four children, who all live apart from her. Her husband, a garbage collector, died 14 years ago. Her second child, Madam Jamila Mustaffa, 52, is a senior social worker at Minds and helped as a translator during the interview.
As a child growing up in a kampung near Telok Blangah, Madam Jamila recalls seeing her mother teach her half-siblings basic tasks such as brushing their teeth and putting on their clothes.
There was "never enough" during her childhood, when food was shared and meat a luxury, she says. The children had to start working young, like she did at the age of 15 as an office administrator.
Madam Jamila, who lost her left hand in a childhood accident, adds that the "caring environment" at home played a role in her eventual decision to work in the social service sector, where she has more than 20 years of experience.
It is only in recent years that Madam Atika has felt the strain of being a caregiver. She suffers from asthma and knee pain as well as occasional dizziness and shortness of breath.
She starts the day at 5.30am, when she sometimes makes traditional South Indian food such as putu mayam or thosai from scratch for breakfast. She also cooks lunch and dinner and does the housework.
Ms Alimah helps with chores such as washing the dishes and sweeping the floor, while Mr Abdul Seram accompanies her to the market on Saturdays.
As all of them are ageing, health is a concern. Madam Patamah has arthritis that affects her mobility and Mr Abdul Seram has diabetes, while Ms Alimah had cataracts which were removed last year.
Madam Jamila and her 49-year-old sister, a baker who lives in Perth, Australia, provide financial and emotional support for their mother and the household. Madam Jamila, who is married with two daughters, calls her mother daily and visits once a week.
Ms Alimah gets $450 from the Government's Public Assistance Scheme and $130 from Islamic Religious Council of Singapore (Muis) each month.
However, Madam Atika does not receive any financial assistance. "I never got used to asking for help," she says.
"All this while, we've supported one another as a family. We feel that we can take care of them," adds Madam Jamila.
Looking after elderly mum
When retiree Lim Toaw Luan's elderly mother was discharged from hospital last year after fracturing her left hip, he readied the family home for her arrival.
But despite his efforts, such as installing a grab bar in the toilet, he was not prepared for the task of caring for her full time.
The 66-year-old used to work as a storekeeper in the warehousing industry and was used to coming and going as he pleased.
Now, a substantial part of his life revolves around his mother, Madam Foo Eng Lan, 91. After a fall last August, she moves with difficulty.
Initially after her fall, he helped her shower and go to the toilet and sometimes awoke at night to attend to her.
Now that she is more mobile, she handle these aspects on her own.
But Mr Lim continues to do the housework and laundry and cooks and buys meals.
He also keeps track of her medical appointments and prepares the medicine she has to take - at least 13 tablets daily, which include medicine for her high blood pressure and diabetes, as well as iron supplements. He watches her diet, limiting fried food and curry puffs.
Although Mr Lim, who is divorced, initially found being a caregiver "very frustrating", he did not consider getting someone else to help care for his mother. He says simply: "I'm not working, so I'm free to look after her."
He is the eldest of four children. His 60-year-old bachelor brother, who lives with him in a four-room Housing Board flat in Ang Mo Kio, is a coach driver with long, irregular hours.
Mr Lim does not wish to trouble other family members, such as his two younger sisters, who visit Madam Foo every weekend, and his two adult children.
"They're busy and have their own families, their own lives to lead. I don't get them involved," he says.
Like many Asian families, Madam Foo and Mr Lim's children give them money every month. However, he handles the financial aspect of his mother's care on his own. He has an annuity and "can still afford" to pay her medical bills. He used more than $6,000 from his Medisave account to pay for the treatment of her injury.
He does not suffer from health problems himself.
An immigrant from Hainan, China, Madam Foo used to be a coffee-shop assistant and a caregiver for Mr Lim's father, who was paralysed for 18 years following an accident and died four years ago.
She has made some physical progress after her fall. Mr Lim pushes her in her wheelchair to the AWWA Rehab & Day Care Centre that is 15 minutes from their home, where she learnt to walk after her fall. She uses a walking stick for short distances.
He says he has gotten the hang of taking care of her.
"I don't do much for her now, though I still cannot go overseas for holidays," he adds.
Caring for husband with dementia
Housewife Tang Kwai Mei, 63, realised something was amiss in 2010 when her husband of 30 years could not press the buttons on the telephone to make a call.
A year later, Mr Chin Mei Hong, 65, was diagnosed with dementia, which hampered his work performance. In 2012, he was asked to retire from his post as a dishwasher at a hotel.
After losing his job of 15 years, he gradually lost the ability to speak.
Having no children, Madam Tang cares for him full time in their threeroom Housing Board flat in Bukit Merah.
She has sometimes found herself telling him: "You can't talk, it's hard for me to take care of you. I don't know what you want or what you are thinking."
Besides keeping house, she does basic tasks for him, such as showering and shaving him and trimming his fingernails. She ensures he has enough water to drink and debones meat or cuts it into smaller pieces for his meals.