Can we say that brothers and sisters love each other?

Maybe there is ambiguity and feelings. After all, they are blood related people, we cannot say they are in love with each other.

You can tell a joke: Brothers and sisters can be said to love each other, and then they won’t have to worry about having a partner in the future.

Haha, maybe hundreds of millions of people around the world have had their wives or husbands since they first became adults.

This is the relationship between brothers and sisters. Just treat him as your own brother and sister. No matter how much they like each other, they are just brothers and sisters, just the usual brother and sister. It would be a joke to say they are in love with each other.