Mmm, nice, Owen's like an animal. Right after funeral straight to bed

People cope with death and other hard stuff in different ways, his mother had cancer for a long time so he may have been already confortable with the idea that she was going to die. For some people it's a relief when a family member who has cancers die bc the last stage is really really bad.
Also he can be using this as a distraction of everything ┑(￣Д ￣)┍