L.L.'s eyebrows rose in surprise. "You want to come with us?" When they went to talk to Thor she was sure the answer would either be a 'yes you can go' or 'no way'. The answer they ended up receiving was unexpected. It wasn't a bad compromise, really, but Thor's presense would likely put a damper on their usual shenanigans.
"I mean, if you want...?" She looked over at Loki questioningly. While it would be strange, L.L. honestly didn't mind Thor tagging along if it meant they could go out so it was ultimately up to Loki to decide.