How does Stevie intend to thank Emily?

Stevie decided to treat his sister on a visit to the sauna. Emily really enjoyed it.
It was a hot, relaxing experience and it did her well. If she knew she could get this kind of treatment every time she did a favor to her brother, she’d be doing him favors more often.

Stevie was also there, of course. It was a mixed sauna for couples. When she looked at her brother, bare-chested with only a towel around his waist, he was actually looking rather handsome.

“Do you like the sauna?” Stevie asked Emily.
“Yes bro, it’s really good.” She smiled back at him.
“Seeing you happy makes me happy.” He said smiling back.
Then Stevie leaned over and gave Emily a kiss.

Next, Stevie put his hand between Emily’s breasts and took hold of the towel covering them.
When he tried to pull it down, Emily tried to stop him.
“Stevie, we can’t.”
“Ow, come on, Emily. It’s not like I haven’t seen them before.”
True, he did see her breasts yesterday, but that doesn’t mean he should see them again today.
Yet, as he pulled on her towel again, she couldn’t summon the strength to prevent him from pulling it down.
All Emily could do was watch while her well rounded breasts plopped free to her brother.
“You really have very nice breasts, you know. “Stevie said as he touched them.
She wanted to tell him to stop, but she couldn’t bring her mouth to move.
When he then kissed her on her lips she even felt a bit of gratification.

When Stevie tried to pull the towel off of her body she dug her nails into it . She really didn’t want to show herself completely to her brother.
“Come on, Emily.” Stevie begged.
“No.” Emily replied.
“Come on, Emily.” Stevie said. “I yearn for you so much.”
He took Emily’s hand and placed it on his groin. She could feel his Stevie’s cock and it was raging hard.
“Can you feel how much I want you?” Stevie told her.
Emily wanted to say no. She wanted but she just couldn’t. Maybe she could instead offer him something else.