Hi,
We have been visited in our garden by a very pretty tabby for the past year or so. Every now and then she would poke her nose into the kitchen and take a peek but then shoot off. She was always very affectionate, desperate for cuddles, and clearly never gets brushed as she constantly malts like crazy.
We've wondered for ages whether she doesn't have a cat flap, as she often meets us at the front door to walk through the house to the back garden!
In the very hot weather dh discovered her looking very hot and bothered and dehydrated in the garden, so gave her some water which she lapped up, followed by a bowl of milk, which she also devoured.
Since then, perhaps not surprisingly, she has been to visit much more regularly. I've bought a brush and regularly give her a brush so we can cuddle her without getting covered in hair. Every now and then dh gives her some milk, now she loves him 
We have been quite worried that she doesn't seem to go home, or can't get in to her own house when she wants. She seems fed, isn't overly skinny or anything (although clearly doesn't get milk at home!)
Anyway, the past few weeks she has been sitting outside our back door meowing and looking very lonely, and quite sad when we close the door on her in the evening. This morning she was out the front and dh found her dirty and wet and meowing loudly at him as he set off for work. He had to leave her meowing on the front step. This morning when I got up, she wandered into the kitchen and lay down for a snooze. She has never been that relaxed in our house before. She's nuzzling me as I type this and purring away and seems so content (and no I haven't fed/watered her)
So, I know deep down that cats are tarts and just want food and cuddles, and will take them where they can, but this little mog seems totally starved of cuddles and grooming and as we have been giving both she seems to want to move in! We don't know who she belongs to, but we worry about her, and I don't quite know what to do now.
Is giving her cuddles and brushes and occasional milk/water a bad thing? She has a collar but not contact details ...