The Master stood there, watching Rose pick herself up without thinking to offer his assistance. He was not particularly used to being thanked, unless it was forced, and he found he had no immediate reply handy. Rassilon, he wasn't about to say "You're welcome."

"There are more of them," he finally said. "The 'Yllax tend to breed rather quickly. Not ones for foreplay."

It was probably as close to an invitation for her to accompany him as she would ever get.