That was their promise at the beginning of this track and till now whatever happened they were together evenif Anu was having ML. My guess might turn wrong. Anu now knows that Pre's husband left her for another woman and today we heard him saying Prerna didn't tell him her husband's name because she knew Anu knows that person & so it is important that for him to see who it is. Which gives me a feeling that Anu will see the pic. And maybe he may have an interaction with Shekar & Suman who might tell him about the phase till the engagement pic. It might trigger some flashes in Anu though he may still continue in ML phase. And now that Anu knows who is Pre to him, the next question that might alert him will be who is Sonalika and why did she lie to him. So, to get that truth out, he will hide his realisation from everyone and this is how AnuPre are going to be partners in crime in exposing Sonalika aka Komolika. But in that process a bigger shock will be awaiting Anu - the true face of his Mom & sister, which can lead to the separation of AnuPre in the next track, as foreshadowed by Veena today.