I have lived next door to my daughter and her husband since they got married 19 years ago and it has been great. I have watched their two children grow up and I wouldn’t change a thing. My son also lives within a couple of miles and I have watched his children grow up also and helped when he got custody. So I say just enjoy it. I love my son-in-law as much as my own sons.
You are one lucky lady. Lots of people would love to be in your shoes.