Depends on day, what they're doing, etc. DD was in her room alone till gone 9 this morning, but since she didn't wake till 8.35 and was then just making her "waking up noises" I left her to it. No nursery today, no guests coming, no planned activities, and she's wiped out after the Christmas excitement.
If DD wakes up at 6.30, I definitely ignore her because 9 times out of 10 she'll be asleep again within 10 minutes. She goes to bed 7ish, her normal wake-up time is around 7.30 and she'll get up closer to 8. Having said that, you can always tell by the sound. She has "waking up noises" which are just little murmurs, sometimes she'll go back to sleep and sometimes they'll go on for 15 mins before she wakes up properly - but if you go in to her in that time she is not a happy bunny and shouts that she's "having a nap" and "no get up yet". She's not a morning person... Unless I absolutely need to rouse her at a particular time, I always leave her till she shouts "Mummy, I'm awake now! Come in my bedroom!". If it's earlier than usual, or a weekend and I'm not up, I'll call back "no, you come in ours" and there'll be a giggle, the sound of scampering feet and she'll appear and climb into bed with me/us. So basically, we know she can if she wants to...
DD's been in a bed since 17m, she's 2.5 now. She's big enough and there's nothing stopping her from coming in at any time she wants, plus she's good enough at communicating that there's no possibility of her being misunderstood. As for breakfast, she simply doesn't like eating early. If you try giving her food before 8.30ish at the very earliest, she'll push it away and say "not hungry yet, later". She prefers 9.30ish. It's a PITA sometimes, but I don't like eating till I've been up for at least an hour either. I just get up a lot earlier! (Also she still has severe reflux - she does get a cup of milk which contains the medication pretty much as soon as she wakes and I think she needs to get that down her and settle before she can have food or it comes straight back up, so may be different for us). Wet nappies aren't an issue at her age, either. If she's wet, she'll shout out "I'm wet, change my nappy please" (she's very polite with her commands) or if she's being particularly enterprising, she'll change it herself - go into the bathroom, rip off the wet one, pull on a pull-up and her pyjama trousers and get back into bed
. She doesn't bag and bin the wet nappy yet though, she usually leaves it on the floor for me to find... really must have words about that
. She has a drink of water in her bed and will help herself if she's thirsty.
So - I wouldn't necessarily judge your sister and bf, think it very much depends on the child. If they really are ignoring her, it's poor parenting but if the child's not hungry, not unhappy and drowsy rather than actually awake, and has the ability and resources to communicate wants and have them responded to, then leave them to their own business. Not all toddlers get up at the crack of dawn and some do need to be prised from their beds. You didn't say what time their DD goes to bed, whether she has a nap, etc...