She bought extra nappies and groceries for Samuels when she could but wanted to do more.
She set up the Givealittle page after Tai died but, not being hugely tech savvy, only had the fundraiser open for a short time.
It is now back open and people can donate to support the family.
Fa'amoe said the funds would be used to make sure her grandchild had school supplies, clothes, and whatever else they needed to have as normal a life as she could provide.
She said the children were coping well but the oldest had dreams where she spoke to her mother in her sleep, and the youngest three often asked when they could see mummy and when she would be awake.
Tai and Samuels had been together for 16 years after meeting at Avondale College.
"He's doing a really good job with the kids, but he is grieving, he is struggling with that ... he often just sits in the garage, staring at the wall, thinking about her," Fa'amoe said.
"He is lost in his own world, he misses Emerald every day ..."
Her bereft partner posted a message on Facebook that day.
"Me and the kids love you and miss you too much," he said.
"Our love to you is painful cause your presence is not around anymore and nothing will ever be the same because I have lost the most beautiful woman in the world.
"I'm trying my hardest to look after the babies ... I miss you my love."