Suggest that you just hang out at her place.

"I thought we could just hang out here." You suggest. "Unless you wanted to go out?"

"No." She says. "A quiet night sounds good."

After your coffee, you excuse yourself to use the toilet. In the hallway, you encounter Tanya coming out of the room across from Sarah's.

Seeing you, she quickly closes the door. "Hi Daniel." She seems a bit frazzled by running into you here and quickly moves away.

Suspicious, you try to open the door but find it locked. You realise that you've never seen inside that room and have no idea what's in there.

When you get back from the toilet you ask Sarah. "What is in the room opposite your bedroom?"

"It's just a spare room." She answers, although she seems suddenly nervous.

"Why do you keep it locked?" You press her.

"We don't want anyone going in there." She says. "We use it for storage and it's a mess."

You drop the subject but can't stop thinking about this mysterious room.