I don't go to her when she is playing, unless it becomes very extended in the middle of the night in which case sometimes going and tucking her in reminds her that it's time to go back to sleep...
So before when I really pushed A times, really high, we just got 30 min naps (with happy rolling around wake ups...) So I always was sure 30 min naps were OT for us.
Then I started putting her down closer to 2 hours, and we started getting some nice long naps.
The night waking has been a bit mixed - sometimes playing, sometimes kind of yodelling (my best description of it, it's not crying!) and sometimes moaning which turns into crying. Often I have found me going to her makes it worse, so unless she is really crying and sounding like she wants me I often leave her.
So today we put down at 9am after a 6:30 wake up. 30 mins ish nap...
Then I got her up after she'd gone on and off for 30 mins with the thumb and playing in between, and decided to push her next A time right out. She was crabby at 12:30 and rubbing her eyes (body clock?) and lunch was a bit fraught, but I distracted her with some baby TV after and kept her up until 1:30. She still didn't show any particular tired signs. Actually, she may have yawned once at around 1:15. Anyway, it's currently 3pm and she's still sleeping.........