Welcome nibblenic, I was on here with my first too. She is 4 so not quite as large an age gap as you, but larger than most it seems! I'm sorta happy about the large age gap, DD will be in school and I will have the days alone to get to know my new baby. When will you tell your daughter?
We've already told her, she is very mature for her age and has a special interest in human biology so has an understanding most kids dont have till much older.
Planning on taking her to the nhs scan, as shes off school but we'll already know if everything is ok due to the private one