Just a Text away!

So I'm at work and decide to text my wife to ask her about her day and then I mention I'm horny.  She texts back what every husband wants to hear, "I'll take care of you tonight." she replies.  She doesn't see taking care of me as an inconvenience but rather as a "Loving Duty".  There hasn't been on time when she's said, "I have a headache" or "Do I have to?"  I'm fairly sure that she doesn't fear getting spanked if she would refuse but we've never really talked about it because it's never come up.  I sure do love my wife!