Did i kiss something important in breakin dawn?

In the 4th book of the Twilight series, I'm at the part where Bella found the bruises on her. I don't get it. How'd they get there? I must have missed something while I was reading, because I don't remember anything about Edward hurting Bella enough to...

put bruises on her. So, what happened to her to cause those bruises?

I asked my girlfriend and she said:

"Bella and Edward are on their honeymoon, they have sex, it skips from the night they have sex to the morning after, and Edward gave her bruises accidentally while they were having sex because he is a vampire and Bella is fragile"

She said it in a really bi*chy attitude because she's a Twilight freak and I guess it came out like that, sorry.

Yea shes right having sex left her with bruises =P