My husband granddaughter

That's an angle I hadn't considered geekesse. But from all angles, I don't like what I'm reading; none of it "sits right".

If there’s any reality in this weird post at all....

An elderly man suddenly has a lot of time and money to spend on a 13 year-old girl, in whom he’s taken no interest at all in the past. Alarm bells! Where does he take her? What is he doing with her? Why doesn’t he want anyone else along?

Apart from struggling to decipher the opening post, I'm also struggling to get beyond ^when this kid shows up.^

If Stewart123 is as blatantly rude, resentful and unwelcoming towards the child when she's face to face with her, as she so clearly is here, frankly I'm not surprised that she's not invited to tag along to meals out with them. As for "^So naturally my attitude had changed toward him and^ his granddaughter,he feels that I don’t treat his granddaughter good but he treats me like crap.

Grow up Stewart123 and behave like the adult you claim to be, not the 13 year old child you obviously resent and dislike so much. #Poorgranddaughter

Assuming this is a genuine post ????? Having personal experience of several thirteen year old girls I found they like nothing more than girly stuff, make up, fashion, music but it's not a competition about spending money, it's about giving time and not ignoring her because OH is manipulating her.

I would advise the OP to up her own game with the child, OH behaviour is not the girls fault but as you have been married for 12 years you have been around for most of her life.

Can you arrange a "girly day" , not necessarily pushing OH out but making more of an effort to be included.

As someone else has suggested, why not cook a special meal at home, get the child involved too and let her see that she is very much part of your life as well as Grandads.

There has been a glut of poorly written posts lately that don’t make sense, but I’ll give the writer the benefit of the doubt.
Like other readers have said, try not to be jealous of your husbands close relationship with your gd, sounds like what a another poster said and they are making up for lost time.

To paraphrase mumsnet, you don't have a step granddaughter problem, you have a husband problem.

I could be wrong but I get the impression that the OP isn't invited when her husband and his GD go out together

Really?

'my attitude had changed toward him and his granddaughter'

Why would you blame a 13 year old for the 'crimes' of her grandfather - it makes no sense?

What lemon said.

Another highly strange opening post, seems to be quite a glut of them at the moment.

Why has she only come into the picture in the last 3 years?, she was obviously around when you married him. Perhaps he feels he wants to make up for previous years.

Have you developed any relationship with his granddaughter? She is clearly important to him and therefore I would assume you would want to get to know her to support him in that relationship.

I agree with oopsadaisy why don’t you join them when they go out to eat? or cook a nice meal for all of you at home, it’s not the childs fault you need to talk to your husband about why this is happening.

Not quite understanding your post, can you clarify?

Although it seems that your husbands GD is very important to him and you might try to get on with GD and not be so jealous.