Expressing breastmilk

[aimsdisney]

Love this pump! (nuk electric pump) got a bottle in less than 30 mins (good for me)
My little girl feeds quite a lot during the night but also likes to use me as a dummy and doesn't actually drink. She often just feeds off one boob during the night and the other one fills up then I express. I only do this if I'm going out all day (not often) is this ok to do or could it effect supply?
Thank you

It won't affect your supply, no. But she's not using you as a dummy, the fact that the other breast is full shoes you that she is feeding