[for what it's worth, Heart's eyes are full of tears too. And upon hearing Diamond's words... at her declaration, they begin to stream down her face, they begin to fall profusely]

R-Rikka... I realized something...

I have been selfish... I've been putting my desires before what's neccessary... if I'd have known better before, I...

[sniffle]

I should have destroyed Regina before they could hurt her... before they could take her back and make her suffer...

...

I won't make that mistake with you!