The god of mischief had not taken the news of Frigga's death too well, he had hoped it was some cruel joke, but somebody would have to be even crueler then he was to do such a thing, he had been sitting in his cell reading a book when one of the guards had told him. He had been quite for awhile before he had started punching the wall and losing his temper and crying.
Loki had never cried harder than that before. He didn't even care that he was hurting himself. What did it matter anybody. Sometimes Loki felt like his mother and Thor were the only one who ever truely cared about his pathetic existence, even if he had told Frigga she wasn't his mother. He regretted that now. Sure he had been rather nasty to Thor too, but there was time to apologize for that,

It was when he was let out of prison though, that Loki felt the true weight of his grief, he had stepped out of his cell and his legs had wobbles and he had almost collapsed. He knew stopping eating and beating himself up hadn't really helped. It felt like his fault that his mother was dead. If he hadn't been so stupid to mess up his life as well as every-bodies he would have been there to protect her.
Loki hated himself for being a terrible son, he walked slowly till he was escorted out, he then just ran, tears pouring down his face and straight into his bedroom, he knew Thor would come looking for him. Loki locked his door and he lay on his bed and pulled the covers over his head. He knew that he couldn't get over this on his own. But he didn't deserve his brother comfort.

Even if Thor was sad too and would understand, Loki thought he had lost right to have his brother comfort him, he also knew that part of him didn't want to feel better. He deserved to be miserable. He had ruined his family. He had only wished he saw them as family sooner. He was sure he wasn't going to be left alone. He closed his eyes and tried to get some sleep.
Loki was miserable, he was tired, being in prison had made it too hard to sleep. He ended up taking a nap, At least his door was closed. He knew if Thor came he would be woken, Thor was loud.