Bled on white sheets

Hey so I’m at a hotel and I was sitting on the bed and when I moved there was dried blood there. I’m sharing this bed with my father ( it’s a king size and there were no other rooms ) so how do I get it out? Like I’m embarrassed to tell him because the dried blood literally looks like shit and it’s on his side. It’s the blanket on top, not the part u actually lay on. How do I clean this up if I don’t have the right supplies? Should I go get the cleaning crew? He just hopped in the shower soo