I get it, OP.
About 10 years ago, my only sister divorced her husband and my parents gave her their brand newbuild detached house worth about £350k! It was my Mum's dream house that she had been patiently waiting to move into whilst it was being built and when they moved out, they had only been in it a year! During that year, they had all the gardens landscaped and added a huge conservatory. They downsized to a smaller 1960's house that needed quite a bit of work doing to it. For a couple in their 70s, it was a big upheaval.
I was having lunch with my Mum in a cafe when she told me the news, and my jaw was on the floor. Although I didn't dream of saying "What about me" my Mum stated that their wills would reflect my inheritance when the time comes. My parents are extremely private when it comes to money so I've absolutely no idea what their savings/ finances are like. I've also no idea whether they have remembered to amend their wills.
I've been happily married for 30 years and we are comfortable financially, but do need to save for big purchases. I guess my parents felt that my DSis needed help rebuilding her life (after being married to a husband very verbally abusive and irresponsible with finances) and they wanted to step up and help her. I do agree with a PP who said about the little voice in her head wondering if they love her more, as childish as it sounds. (This is the third house my parents have bought for my Dsis, but before that it was property bought in their name passed off as an investment which she rented from them)
I've quietly noticed that they are still paying for various things for my sister's "new house" Expensive custom made shutters, a weekly cleaner, a gutter cleaning company comes twice a year to clean out the gutters and soffits.
I used to let it bother me a little, but now it doesnt. I look at it a different way and actually feel very proud that DH and I stand on our own two feet and, except for my parents gifting us with a £3k wedding present which we used in 1994 to put down a deposit on our first home, what we do have is as a result of our own hard work.
Please don't let this fester and cause resentment towards your parents. I can't remember whether you mentioned their age but they won't be around forever.