Help me analyse this poem?

This is a 21st century poem I have to analyse and make a speech on... I know what the poem is about in general but I don't really get each line and i'm having difficulty identifying the poetic techniques in it... except for the fact that the lines are broken up and detached like a person's imagination... So all help is appreciated! I'm working at a 11th grade level btw... Here's this poem:

SECOND WIFE (2004)
I keep drawing the first
one from the cemetery
into the house
and pose her
perfect as a mannequin
at the kitchen table
where, chin resting
on a long-fingered hand,
she surveys
the bran muffins
and finds them crumbly.
I imagine her coming
to their bed
smooth-bodied.
I arrive bone tired,
half a century
etched in my flesh.
She gave him
babies. I, a notebook
filled with poems.
Guys... just to tell you the narrator is a woman...

Let me preface this by saying all poems may have several different meanings or interpretations depending on your state of mind, gender, age, etc. As a female, I feel that whenever you're the next women in a relationship you will always compare yourself to that previous women, which is what this narration is about, in my opinion.

His first wife either died physically or died metaphorically after their marriage and love ended. Either way the 1st wife probably 'died' when she and the husband were still young and fertile. The lines "I keep drawing the first one from the cemetery" shows the second wife continually obsesses and thinks about the first wife in comparison to herself and draws her out of this 'death'. The line "and pose her perfect as a mannequin" suggest the second wife idealizes the first wife as perfect and yet unreal or fake as though no one could ever really be that perfect because after all it is an idealization (that's what an idealization is-an over exaggeration of how someone was--many people idealize the memory of others after death). It could also be that the second wife is 'still alive' to the husband and can age and become withered with time, while the first wife will forever be young and unchanging in the husbands mind, hence perfectly posed as a mannequin.

The lines "she surveys the bran muffins and finds them crumbly" seems to suggest that the second wife may be judging herself through the first wifes eyes as unappetizing when compared with the first wife (possibly it could be that the bran muffin is a representation of the second wife, older and falling apart with age, not as appetizing as a fresh muffin).

The lines “I imagine her coming to their bed smooth-bodied…she gave him babies” is the second wife coming to the conclusion that the first wife gave the husband something she can't. The first wife was young, supple, sexually appetizing. The second wife is or feels 50 years of age (it isn't clear whether she really is 50 or just feels 50) Anyway she feels old when compared to a young thing like the first wife, and 50 is about the age where giving birth is no longer an option. So the second wife feels sexually inadequate or less attractive, possibly because males instinctually want to spread their seed and he does not have this option with her.

The last lines "She gave him babies. I, a notebook filled with poems" could be interpreted a couple ways. Either the first wife continues to view herself as imperfect and inadequate, and shows this by saying all she could give her husband to express her love is a heartfelt notebook filled with poems, which could never compare to giving someone children. Or this ending is meant that the second wife realizes that she IS expressing her love to her husband in just as meaningful away as the first wife did; the first wife through sex and baring his children, the second through a heartfelt notebook filled with poems.

Hope this helped! Once again this is just how I saw it, and may just be a bunch of crap that is interpreted completely wrong, but hopefully I gave you some ideas to think about and use in the speech. This is a difficult poem for high schoolers, so don't fret if you don't fully understand it, and Good Luck!

"House of the Flesh Mannequins" Trailer