Toddler routine please. Wide awake 2.8 in big bed / our bed

[JamMakingWannaBe]

LO has been a great sleeper (7pm to 7:30am) up until recently.
As her bedtime was 7pm, we had dinner at 6pm, wind down, bath, story then cot, where she would say "night night" and roll over to sleep.
This started changing slightly to "another story. You stay there" i.e. In her room. Then she started saying she didn't like the cot so we bought her a big girl bed.
She now plays up at bedtime, asking for "another story" and we've taken to either keeping her up, no TV just looking at picture books, or cosleeping in her bed until she falls asleep. This is now nearer 9pm.
We live in a bungalow so have no stairs but 5-6AM she's taken to climbing into bed with us. DH and I have both had a bad cold so need our sleep and don't have the energy to put her back in her own bed.
Do we need to admit that her bedtime is no longer 7pm? What should it be for a 2.8 year old. She wakes about 7-7:30am and sleeps for an hour at nursery.
How do we tackle the AM arrival in our bed?
She's really spoilt us by being such a good sleeper up til now. It's too easy just to let her stay in bed with us!

Toddlers have next-to-no impulse control. If they want something they want it now and are difficult to negotiate and rationalise with. This is the reason for the toddler tantrum stage, as they learn to control their emotions and understand delayed satisfaction.

At 2-3 years old, it's a case of I want to sleep with mum, I can physically get to mums room, I will therefore kick up a fuss unless I get what I want. This is more of a toddler behaviour issue than a sleep issue.

I wouldn't have swapped to a bed, it's probably added to the problem so if you can go back to a cot I would.

I would significantly par-down bedtime routine. Wash, teeth, nightwear, one story, kids, into bed/cot. No fuss or faffing, straight from one to the next to the next. Then it's about keeping her in bed. Much easier in a cot, now in a bed you'll have no real option but to sit by the bed to keep here there - which is exactly what's got you to this point where she wants to go to sleep with mummy there. But I wouldn't engage and I wouldn't lie down. Then repeat the same when coming in at any time in the night.