Starfire

The Tamaranian Titan was too focused on thinking about her Home Planet that she didn't notice that anyone was in the Hot Tub.

She suddenly became aware when Donna let out an undignified yelp.

"OH! I mean, oh, the friend Donna. You look relaxed."

Donna covers up.
Less relaxed now.

"Do you mind?"
"Oh, of course," Starfire replies.

She reaches down and peels off her top.
Before Donna can say anything, her orange hands slide down her skirt and panties too.

She stands there buck naked in front of an already naked Donna.

"I forgot the dressing of the code," Starfire says, "May I join you?