To think this is a bloody cheek?

[Nomoretogive]

I will start by being honest and saying I do not have a great relationship with my inlaws. They love my dd and ds but are not at all fond of me! Fair enough and I have, I hope, always tried to keep the doors open for them to visit etc.
However, and here's the difficulty; they only visit when they are up in the area for appointments etc and then only for an hour or two between other engagements.
They haven't seen the children for over a year and last time was for 2hours when they were here to go to the dentist. They are coming up to visit the accountant this week and have said they have an hour in which they would like to see the children.
I am actually livid at the moment and don't feel I can give them an answer right now........
How would you feel about this and am I being a selfish moo if I say no.?

Thanks for the continued support. I know that the relationship is a two way street Choc but I am unable to drive at the moment and indeed to travel much after having a stroke earlier in the summer.
Prior to the illness we were not invited or encouraged to visit and the children were not ready to travel independently to their grandparents.
I do understand how hard it has been for them losing their Son and so have always kept my mouth shut but I really hate the thought of the kids asking so many difficult questions again about why their GPs don't have them to stay etc and why they don't come to visit.....
Aargh! I feel like I'm pulled apart. Damned if I do etc.....

Can you say you're busy then, but suggest they come over for a whole day another time to see the kids properly rather than for just an hour?

I would suggest that they find it really difficult. They have lost a son and seeing you all is a painful experience for them. I would guess that they would live to be part of your live but tying it in with an appointment mask it wiser for them they can probably only emotionally manage small periods.
Grief is a terrible thing and affects people in different ways
I would meet them and I would sit down and have a talk to them. They probably think that short visits are not stepping on your toes whereas acyllu you want to see more of them.
Time for a heart to Heart

In that case I'd do as I mentioned, and sit them down and have a grown up discussion about where to go from here.

Have your PIL got other grown-up children? (ie your dcs' aunt/uncles) If so, perhaps you could hint in a tactful way to them and it might filter back to PIL.
I'm so sorry for your loss and also that you have suffered a stroke.
Personally I think you'd be wasting your time trying to encourage more contact, as they seem to have been detached from the start.