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

I thought there was a Amore triangolo between them. rosa and blue diamond were together and yellow was jealous and shattered rosa 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 rosa might have acted portrayed da Stevonnie, I think a maybe they could've had a mother-daughter relationship. what do te think?