He and Celia had spent the entire night inside the Mirror Dimension. Emily shouldn't have been able to enter it so casually unless something about her abilities had changed.
Isaac thought about it for several seconds before reaching the most likely conclusion. 'So she's learned to phase through sub-dimensions.'
It probably wasn't true dimensional travel. The Mirror Dimension was still connected to reality rather than existing as a completely separate world. Even so, slipping through that boundary without relying on a skill was an incredible achievement.
'The Netherworld's heir really is frightening,' Isaac thought with a smile. Pride naturally welled up inside him as he looked at the sleeping Emily.
Unable to resist, he buried his face against her neck again and planted another kiss on her nape. Emily complained in her sleep before weakly trying to escape, her body squirming without even opening her eyes. Isaac teased her for another few moments before finally standing up.
