The longer he considers it, the more nervous Lucy got. Erza could wake up any second, after all. This was a huge risk! ...but probably worth it. No, not probably. She was always more comfortable with him after all.

"Yeah..we don't want her to wake up." And get mad. Though she paused at his rational - it did make sense for him to be on the other side of her. If they pulled the blankets up Erza might not notice. Of course, she was thinking he was just going to walk to the other side of the bed. She'd have to exercise a supreme amount of effort not to freak out if he climbed over her.