This is a very "adult" poem, in my opinion. It is all about responsibility.
Although not specified, I sense this funeral was for a mother. It is therefore exploring one of the most significant experiences in any person's life – the time when they finally and fully transition from being a child to an adult.
Because even as an parent with children of my own, one realizes that one's own mother continues to "mother" us all through our life – guiding, prompting, encouraging. She is always "our mother" – and we are always her "child" in our relationship. Now she is gone, forever.
And the task managing of the affairs of a deceased parent is a confronting milestone of adult life.
Having "known" her all our life, it is possibly the greatest shock when our mother passes – not just because we now have "to manage" on our own, but also because as executors of an estate we can become privy to items of personal memorabilia, photos and letters which perhaps we have never before known about – aspects of a life which was her "secret", and which we also need to "manage".
And here is another important manifestation of adult responsibility – keeping confidence, protecting secrets, refusing to betray them – even – or especially – when the person is deceased.
I also really like the way the construction of this poem matches the content. It appears to start with what will be a 5-7 syllable pattern, implying for me "tradition", stability – but it breaks down like a tearful participant at a funeral, and the final line is abbreviated. What will follow? That is for each of us to complete in our own lives.
Thank you Claudette for another incredibly engaging and thought-provoking haiku.