What is the theme of the poem on pages p. 157-158? (from Clearances)

"When all the others were away at Mass
I was all hers as we peeled potatoes.
They broke the silence, let fall one by one
Like solder weeping off the soldering iron:1
Cold comforts set between us, things to share
Gleaming in a bucket of clean water.
And again let fall. Little pleasant splashes
From each other’s work would bring us to our senses.
1 solder . . . soldering iron: the substance and tool used to fuse metals
So while the parish priest at her bedside
Went hammer and tongs at the prayers for the dying
And some were responding and some crying
I remembered her head bent towards my head,
Her breath in mine, our fluent dipping knives—
Never closer the whole rest of our lives"

The theme of this poem is the intimacy and closeness between the speaker and their mother, specifically during a mundane activity like peeling potatoes.