Dogs do not have siblings in the same way humans do. In a litter of puppies, they are all considered siblings, but they do not have the same familial bond as human siblings.
I am a third-party voice and do not have a relationship with your friend's sister.
Your husband's sister is your sister in-law.
How could the relationship between Pip and Biddy be described?
nothing
They are Brother & Sister.
Parasitism
Shanis's sister is named Maya. Their relationship is close and supportive, with a strong bond of trust and understanding between them.
Your husband's mother's sister is your husband's aunt. She is not realted to you.
There is no symbiotic relationship, fleas are parasites.
Parasitism
parasitism
A brother and a sister, both being children of the same parents, are siblings.