Explain this cat behaviour PLEASE!

[MrsMaturin]

We have a cat - M. She is about 5 now, female (obvs) and was neutered when we got her from Cats protection. Defiantely done, we could see the scar etc.
We have a garden and her usual range is pretty small, the garden and nearby.
A few weeks ago a very handsome silver cat started coming in to our garden. He (we think) is NOT aggressive towards our cat but he is very interested in her. He comes up towards our glass doors and miaows a lot. If she is out there he tends to follow her and she runs away evetually but there is no puffy tail, no hissing etc.
He seems to be friends (!) with a ginger and white cat who has also come in to our garden. M does seem to be antagonistic towards this cat, came in yesterday with a puffy tail and shortly afterwards she was looking out of our glass doors and the ginger cat charged up to the doors and 'attacked' her through them, hissing etc. This morning dh has seen her outside with the silver cat, perfectly happy but she ran away when he got too close. Why does Mr silver stripy miaow so much? i didn't think cats miaowed at other cats!

SO WHAT DOES THIS MEAN?

She is silver stripeys ow, ginger is a female & is very annoyed about it.

Hmmmmm that's what my dds think........

Some cats are more social than others. Mine is - in our old house, he had a couple of cat friends that would visit, he would charge up to them meowing his little head off. One was male, one female. I suppose he did seem fondest of the female, even letting her eat his Dreamies (his Favouritest Thing Ever). Silver stripy sounds like one of those gregarious types. In the wild they would be loners, but I suppose domesticated cats retain much of their kittenish behaviours, due to us feeding and taking care of them.

Even after neutering, they still produce some hormones.

Interesting.......we need to encourage M to be friendlier then. Dd wants to get her a kitten but I think she would be happier by herself because I thought that was the accepted wisdom for cats which have always been 'only' cats.

Any other thoughts?

We have a neighbours cat that miaows for ours to come and play however ours doesn't like other cats and ignores him. He does tend to miaow at 4 in the morning outside our bedroom window which we weren't keen on as he is loud and persistent (we fired a water gun near him to persuade him to transfer his affections which works for a time and then he comes back again).