For this text:

>dreaming of houses uncluttered by reality, by half a lifetime of memories, perhaps.----

What does this mean? Does it mean:

The one who was leafing through Country Living Magazine was dreaming of houses uncluttered which the one has no such houses so uncluttered in the one's reality and perhaps the one has no such houses so uncluttered in the one's half a lifetime of memories.

Or can i understand the sentence in this way:

In the one's reality and perhaps in the one's half a lifetime of memories , the one's house is cluttered up with many things, and this provokes the person to dream of houses uncluttered which are in the Country Living Magazine actually.

What does “dreaming of houses uncluttered by reality” mean?

The context is :

>Boy-blue and girl-pink. Through the kitchen double-doors I watch you eating supper – carrot and coriander soup – and leafing through Country Living Magazine, dreaming of houses uncluttered by reality, by half a lifetime of memories, perhaps. But my, how well you look. White hair endows you with the demeanour of a friendly witch.

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Excerpted from David Mitchell's novel "The Gardener" partly:

>Satin white, Persian purple, oil-paint yellow. When I planted these birches they were broomstick-height, and now look at them. They tap our bedroom window on stormy nights. Hyacinths on (what I fondly call) my rockery. Boy-blue and girl-pink. Through the kitchen double-doors I watch you eating supper – carrot and coriander soup – and leafing through Country Living Magazine, dreaming of houses uncluttered by reality, by half a lifetime of memories, perhaps. But my, how well you look. White hair endows you with the demeanour of a friendly witch. Our geriatric radio – a wedding-present from my brother – is twittering away to itself.