Check her out

You take a good look at her.
Arabella notices your look and adjusts herself slightly, to give you a better view.

She tells you that being discrete is hard, and it demands a lot of both persons, so it's not always worth it, and also that she have to be very careful with who she is and the person must listen to everything she says and never even look at her in front of Calvin or she will have a lot of trouble...

It's implicit that she's putting conditions on sleeping with you, and they do seem to be reasonable. Still you don't like how she's hiding herself if her husband is open about his affairs and even encourages her to sleep with some people that he chooses. It just doesn't seem fair.

So you nod and then shake your head. She asks what it is this shake head thing, and you tell her that you just don't know how Calvin can ignore a woman like her... She becomes embarrassed in a fun way and you laugh and say it's true.

Arabella then shakes her own head and says she shouldn't be talking about those things and say she must go... So you look at her eyes and say she should stay.
And she looks at you and ask why.

You get closer to her, but she makes no move to get away from you.
You lean on her and ask if she can keep a secret.
She looks puzzled for a moment and say yeah, of course
So you grim like a wolf and say that you can too.

Arabella laughs, looking at your eyes, and you kiss her.

...

She kisses you back.