Is This Selfish Queue Jumping?

Yesterday an acquaintance forwarded to me a link to the NHS booking  system for the Covid jab telling me that she had booked her two appointments. Her daughter, who appears to have both condoned and encouraged her mother, phoned me last night to ask if I had now booked my place. I queried with her when her mother had received her invitation letter as I hadn't had mine yet to which she replied that she hadn't had one, it was a neighbour of hers who had forwarded the link to her so she booked her place telling me that there were lots of appointments available.

Commenting to her that I didn't think it was right she said that as her mother was in the relevant age group, (she is 73) it was permissible to book whenever she wanted to. This is the first and only time I have heard this claim. I clicked on the link out of curiosity and it quite clearly states "Do not use this link until you have had an invitation" (or similar words).

Is it me being prepared to wait my turn (I'm 74) or is she right in what she has done?