Short version: We are second guessing our choic from years ago and are leaning towards changing. Have you ever felt this way? How would you handle the switch?

Long version: When LO1 was still under 1yr old we had asked my brother & SIL if they would be his guardians..(we really only discussed LO1 and didn't talk about future kids) We knew that we wanted our parents to still be able to be grandparents to our kids if something happened and not make them take on the parenting role and we wanted LO to be with family... Fast forward to now and we now have 3 kids, could possibly want a fourth and my brother and SIL have experienced a pregnancy loss and have been unable to get pregnant since then... We have also noticed over the years that they really haven't connected or reached out to our kids at all. We also feel like it wouldn't be fair at this point to throw three kids in their laps when they've been through so much themselves. I've always doubted our decision a bit but that's partially my personality with something like this. My parents were always encouraging that my brother would step up if something happened and we expected them to connect more as the kids got out of the baby stage. But now nothing's really changed and we have been considering another couple as potential guardians. They have relationships with our kids already and have the qualities we would want for our kids. I do recognize that the fact that my bro & SIL haven't been able to have their own kids yet could be playing a part on their relationship with our kids... But I am hesitant to think that's the only reason for the lack of connection.

What would you do if you changed your mind as to who you'd want as guardians? How would you handle it? Is this going to ruin my relationship with my brother and SIL? Should I just ignore my doubts? Ugh... Please help!