I believe Firebase does suggest flatten your data for better and faster search

Firebase Database: How do you properly structure your app’s data? Have you worked with Firebase Database yet? If you fill this in, you will be marked as a spammer. I’d like to receive the free email course. I will love to see more noSQL database best practices, structure technique._ Cherryl:And she will simile and acknowledge…
_

Wanetta:
I don't how I can say anything because I don't want to tell her I know she's talkin to him because I see it on my phone statement, but it really hurts to look at the statement online and see her texting him... what do I do?
(20 November 2016)

Wanetta:
Even texting him while she's with me but she's really good at hiding it while she's in front of me.
(20 November 2016)

Wanetta:
It just turned month 3 of us dating and 2 days ago she had a 45 minute conversation with him.
(20 November 2016)

Wanetta:
They'd only talk for a few minutes.
(20 November 2016)

Wanetta:
He we text her or call once a week or so.
(20 November 2016)

Wanetta:
She's on my phone plan so I can see when they text and talk.
(20 November 2016)

Wanetta:
He kinda kept in contact with her.
(20 November 2016)

Wanetta:
She finally said she made a mistake with him and wanted to be with me.
(20 November 2016)

Wanetta:
She was still in love with her ex all summer and she kept running back between us.
(20 November 2016)

Wanetta:
After they broke up she ran back to me and I immediately fell in love with her.
(20 November 2016)