She really cant betray her sister again, Pompeo tells EW.
Yet shes finding herself in this triangle that Maggie for sure is going to see as a betrayal.
Maggies feelings will actually help Meredith keep Riggs at arms length for the time being.

Credit: Richard Cartwright/ABC
She actually is using it as an excuse to not have to deal with Riggs, Pompeo says.
Meredith sees it as protecting her and doesnt want her sister to get embarrassed.
However, Riggs doesnt know that the Maggie situation is complicating it, Henderson says.

So hes like a bull at a gate.
Therefore, the more Meredith pushes Riggs away, the more he thinks shes just playing hard to get.
He uses that to prove his point, that thats because she wants him, Henderson says.
Shes caught between a rock and a hard place.
Keeping this secret from her sister will likely end up blowing up in Merediths face.
I would think there are going to be repercussions, Pompeo says.
Eventually Maggies going to find something out.
Trust is a really, really important issue for Maggie.
Through navigating the love triangle, viewers will also learn much more about Riggs.
Do we like him?
Is he a good guy?
Is he a bad guy?
What really happened with Megan in the past?
Whomever Riggs ends up with, Henderson teases that hes been working much more with Pompeo this season.
We were kept quite separate in the first season that I was in, last season, Henderson says.
Im really enjoying just connecting creatively with Ellen on screen, and I think we work really well together.
Its always fresh and fun.
Greys Anatomyairs Thursdays at 8 p.m.