Christine, good points on here by ahk, who I notice is Liana. Happy to know you, Liana!
So, I think you are going to have to be firm with her. I don't know a lot about SA, but I do know it tends to rear its ugly head with teething, so that may be worth a check. But, you're right, you can't always have DH to fall back on because sometimes he won't be there.
My DH travels for work and is gone a lot at the beginning of the year. Well, one night came in about April and we realized that DD refused to have him put her to bed, because I'd been the only one to do it for about 4 months! Ooooops!
So, now, she'll go down with him fine if I'm gone, but if I'm in the house, it's always a no go. He'll be home much more the next couple months, so it's something we're going to work on.
So, I know where you're coming from, it's easier to go with what she knows, i.e. Dad telling her what to do, but I think it's best for all of you for her to learn to respond to you as well. Yes, WIWO is hard, and it has taken me well over an hour in the past as well, but you're right, it is for her own good. I always have to tell myself that in the heat of the moment!
* The other thing I'm thinking that maybe I need to up her A time a bit now that she is well, although up until today, she's been put down awake and has been fine for the 5-10 minutes until she falls asleep herself. Maybe she just needed a reminder today...not sure...
So, she might have just needed a reminder, but she also may need to up the A time as well. What has your routine looked like the last few days when she was going down quickly? It looks like right around 4 hr A is still about right in the morning. Then, you may need to go to 3 hr 45 min A after the 30 min morning nap. Another option would be to start cutting the morning nap shorter and bringing the afternoon nap up as well, but you still have a pretty early wake up, so it's probably not needed yet. HTH!!