Friendships were put to the test during Season 13 of ABC’s “Grey’s Anatomy,” now romances within Grey-Sloan Memorial Hospital will have to weather the storm or prepare to be washed away.

The synopsis for episode 4 — titled “Falling Slowly” — suggests that Meredith (Ellen Pompeo) and Riggs (Nathan Henderson) will finally decide whether to define their secret relationship or let it fall by the wayside. It is unclear how their decision will affect the relationship between Meredith and her half-sister Maggie (Kelly McCreary), who has been pining after Riggs for quite some time, but it’s unlikely that she’ll take the news lightly.

Meanwhile, Amelia (Caterina Scorsone) and Owen’s (Kevin McKidd) relationship will hit a bump in the road, leaving them questioning their decision to get married in the first place.

Check out photos from the set above for more on what’s to come in Season 13, episode 4 of “Grey’s Anatomy.”