Owe

Hi,

Please, do I need the preposition before “me”?

We fell out over the money she owes (to) me.

TIA

No, and I would change "owes" to "owed" to make the tenses agree.

I second what Guest said.

I second what Guest and Lazar said.

I second what Guest, Lazar and Liz said.

Lets see, hmm..I second what Guest, Lazar and Liz said. I also second what Mr.posts filler in turn (lmao!!!) second.

And if she still owes it?

you go over there and kick her butt

A sound piece of advice, Lol.
And in terms of grammar? It's still relevant, so I guess the concord is not necessary.

I think one way to express that, while maintaining tense agreement, is to use the perfect:

"We've fallen out over the money she owes me."