I bet she's an enthusiastic cocksucker for the right guy. I bet the last guy she blew couldn't help but bust in her mouth. She found that pretty rude, but she kept on sucking.
Why? Because he has a big dick. Women will seriously do anything for a big guy. They will drop to their knees. They will beg him to let her suck him off.
He held her there and fucked her face until he was done with her.
She wanted to please him. He didn't even have to try.