It could be an aunt or older sister, but mother's more likely.

虽然也可能是姑姑或姐姐但母亲最有可能
Now, he was a fisherman,

他曾是渔夫
the scarring on his hands is distinctive, fish hooks.

手上的疤痕很独特是鱼钩造成
They're old, suggest he's been unemployment for some time.

伤疤是很久前的了说明失业已久
Not much industry in this part of the world,

这里工业并不发达
so he's turned to his widowed mother for help.

所以他才找自己的寡母求助
Widowed? Yes, obviously.

是寡母吗当然明摆着
She's got a man's wedding ring on a chain around her neck,

她项链里挂了个男戒
clearly her late husband's and too big for her finger.

明显是她亡夫的她自己戴太大了
She's well-dressed, but her jewellery is cheap.

她衣着精致但首饰都是便宜货
She could afford better, but she's kept it, sentimental.

她可以戴更好的但由于情感原因一直没换
The dog? Tiny little hairs all over the leg

我怎么知道她养狗她腿上有小细毛