@Panisha I’ll probably be 45 mins away, yes, I’ll make sure to leave lots of snacks and a lunch I know she’ll enjoy
Maybe do a test/trial run before lunch with your friends? Take yourself out for a solo coffee date nearby and get your sister to look after baby. That way baby gets a little bit used to someone else looking after her, but you're nearby enough to come back if needed. Also that way if you've done it before (and hopefully it goes well!) you might have a better chance of being able to relax and enjoy yourself when you go for lunch with friends
I would just recommend being flexible with her routine that day. My sister was the first to be left with baby and we just said if he doesn't want to sleep and is happy awake, leave him. Have fun. It won't mess up his routine. Worst case scenario and it's ages past his nap time, go for a drive in the car! Chances are, both your sister and baby will have a lovely time! Enjoy yourself!
I felt the same way when I first left mine! How far are you going for lunch? I tend to ensure I've left enough snacks/ideas for food that I know he will love and then that eases it a bit. And (ive only left him with my mum) just asked her for text updates like I get at nursery. That helps