Conversation so far:
who does penny sleep with on the big bang theory
On The Roommate Transmogrification, Raj and Penny slept together.
Who's Raj on The Big Bang Theory?
Rajesh Ramayan Koothrappali, Ph.D. is a fictional character on the CBS television series The Big Bang Theory, portrayed by British Indian actor Kunal Nayyar.
Why did Penny sleep with Raj on The Big Bang Theory?
Penny and Raj become intoxicated and, despite agreeing to remain good friends, end up in bed together.
Then what happened, after Penny and Raj slept together on The Big Bang Theory?
When Penny and Raj emerged from Leonard's bedroom, the others saw them and Penny said It's not what it looks like.

Question: How did the other characters feel about that?
Self-contained rewrite: How did the other characters on The Big Bang Theory feel about Penny and Raj sleeping together?