Marina wasn't exactly sure why he'd invited Thomas over, other than that she'd enjoyed her time with him. She'd been here a few weeks, and she'd pretty much stayed under the radar during that time...for many reasons.
First, she had told the medical team about her healing abilities because she'd had to - they needed to know. But other than that, she'd kept the fact that she wasn't human secret. And keeping that quiet and staying under that radar, she hoped that the Mogadorians wouldn't find her.
Secondly because...well...she'd been a little broken when Eight died. She'd pulled back and still wasn't quite over that yet, even if time had passed. She hadn't had a chance to get over it, they'd been fighting too much back home. And this guy seemed like he understood fighting.
She saw him coming up the walk and was at the door before he had a chance to knock on it.