Yeah it's a hint, but since your dd was already sleeping in a separate space in your parents' house I don't know that it's actually a problem. It is a problem if they don't let you put the little bed in the same place the sofa was.
This reads more like an attempt to get your dd to *want* her own bed and, you know, that would be fine. Assuming, of course, that they don't belittle her to get her to want one, just providing a pretty bed that she loves is fine. Especially since, from the sound of it, they'd *love* to buy her one to have at your house.
Now, just having her own bed in your house wouldn't mean she'd ever sleep there.
This reads more like an attempt to get your dd to *want* her own bed and, you know, that would be fine. Assuming, of course, that they don't belittle her to get her to want one, just providing a pretty bed that she loves is fine. Especially since, from the sound of it, they'd *love* to buy her one to have at your house.
Now, just having her own bed in your house wouldn't mean she'd ever sleep there.
