The flowers laid there raised enquiries of suspicion due to Becky's lethargicness, and if it continues... She'll undoubtedly be caught in no time. When Becky was done visiting someone(Cameron), she came into her actual dorm and asked Takahashi of anyone came to the dorm.
Takahashi: Oh yeah! now that you mention it, Sansui came. Nothing to worry about though! He just wanted to return my record notebook.
Becky took one look at the bedroom, eventually realizing that she messed up...
Becky: *keeps the bouquet of flowers in the drawer for safety from getting caught* in the near future*
Goodness! Takahashi!! Next time just ask me if the person is allowed to come in or not!
Takahashi: Jeez okay, okay! Isn't he your boyfriend or something? Why're you acting like he's a stranger?
Becky: I clearly didn't mean it that way! What if something bad happens??
Takahashi: Yeah, yeah! Whatever... Not to mention, Sansui took a photo of the flowers and left the place. Really don't know what's his motive...
Becky: What kind of person takes photos of things without the permission of the person owning the property?? I'm going to his dorm right this instant!
Takahashi: *spots something immediately* Wait! Are you alright? You got some kind of bruise around your neck...
Becky: *puts her palm over that spot, clearly caught off-guard* Stop over-analysing everything! It's nothing! That's it. I'm going to that dorm. RIGHT. NOW... Make sure no one comes here!!
Takahashi: Hey, calm down! It's just a photo of the flowers! Who knows? He must've thought that was your favourite kind of flowers so he might have took a photo of it to get that same kind!
Becky: Hate to admit it but... You have a point. But he should've asked instead of taking photos of it!
Takahashi: Random question, so... If Sansui didn't give you those flowers, then who?
Becky: My aunt just opened a bouquet shop, so I bought it from there actually. Their flowers smell good, although bees come to the shop from time to time which will be a safety hazard eventually... OK FORGET IT! FINE! BUT I HAVE TO TELL HIM TO DELETE THAT PICTURE AND I WILL TELL HIM THE NAME OF THE FLOWERS MYSELF! BYE!!
Takahashi: Bye!
Becky is now on her way to Sansui's dorm to tell him to delete the picture that. But for some reason she's on with her next plan and that is to make things complicated for Sansui through creation of ridiculous assumptions... At this rate, only divine intervention can come to Sansui's aid...