Am I Right To Be Annoyed And Upset...?

[Baby_Sham]

This has happened so many times now, and each time I have debating asking for opinions on here, but I am literally seething right now....!

My parents never ever EVER babysit my children. I hardly ever ask them, as I know what the outcome will be, but I have two other sisters with children and it doesn't seem to be a problem for them.
As I said, I hardly ever ask, but I asked a couple of months ago when I was absolutely desperate and they said "yes, no problem" (as always) and then called up on the morning they were supposed to have them and said they were "too tired" - again, as always.
I don't ask much of them, they've never helped me out when I needed them and I've always had to rely on friends or my husband.
I do quite a lot for them, things that may sound petty but still equate to me being the one they rely on when they need help with something. Some examples:
My Mum is a complete computer-phobe and recently wanted some stuff put onto Ebay. She phoned me up late at night and said she needed it doing "that night" and could I do it. I don't like to say no so was up until the early hours doing it for her.
Another time, just recently, she called me and said she needed some stuff printing "desperately". I said I was on my way out to an appointment (a really important appointment) but she said she needed it printing within the hour or she would lose out on something. She then just came round and I spent the next two hours sorting it out for her, and ended up missing my appointment - which she didn't seem to give two hoots about.
She has been moaning for the past few months that my Dad won't take her anywhere she needs to go (she doesn't drive) and she desperately needed to get some stuff for her holiday. I felt really bad for her so found a coach trip that went to the place she wanted to go, checked with her first and then booked two seats. I haven't got much money and said her "do you definitely want to go?" and she said "yes that would be really nice, thankyou", so I booked it. The day before we were due to go she sent me a text to say she couldn't come as she was having injections for her holiday and had forgotten about it. I said I wouldn't be able to get a refund, and would lose the money, but she just said "sorry, but I forgot". A few days later I couldn't get hold of her, so rang my Dad, and he said she "had gone shopping with my older sister"... to the place I'd booked the trip to! This may sound daft, but I was really upset.

I've had quite a lot going on recently and I just feel really alone.
Today is an important date for me, for whatever reason, and I have asked if they would be able to have my kids for a few hours tonight. My Mum has text to say she can't as she is really tired, behind on her holiday packing and has "been up all night being sick" - although my Dad seems to know nothing about this so I think it's just an excuse.
I was supposed to be doing a family bbq tomorrow but I've said to her I will postpone it until she comes back from holiday as if she's sick them that'll be the last thing she feels like. She's just text me to say "no, I'll be fine by tomorrow and I really need you to print out some tickets for me".

I've also just found out they are having my sisters FOUR kids during the half term for TWO weeks. I asked my Dad if he was mad (the kids are totally out of control) and he said "I couldn't say no, I felt sorry for her"..!!!

Is it just me, or would the majority of people feel pretty pissed off by this?

[Ric.ror]

Baby you may not think it but good for you
You may not think it but you have stood up for yourself
I would make my life around my children if your other family want you they know where you are

[libralady]

You need to get a grip, parent's are not put on this earth to babysit whenever needed....stop whining and get a babysitter....

[Baby_Sham]

Er.... 'thanks' for answering this question, despite the fact I had it covered back in JULY last year :-/

Also, thanks for breaking your usual habit of only answering crossword questions... I feel honored.