What kind of relationship do you think was between pink, yellow, and blue diamond?

I thought there was a love triangle between them. pink and blue diamond were together and yellow was jealous and shattered pink so she can be with blue is why she was trying to get her to forget about pink. but after seeing " Jungle Moon" after the way pink might have acted portrayed by Stevonnie, I think a maybe they could've had a mother-daughter relationship. what do you think?