A bunch of tips...
1. Me personally, I'm leery of shooting with animals as props. Specifically with this shoot, it moves from boudoir (which is generally a soft, romantic feel) to either edgy or fetish or very lusty (even if no skin is being exposed).
2. Depending upon what she's wearing (or not wearing) during the shoot, clothing (tight jeans), bras, panties...they all leave marks on the body. Ask to wear something loose that won't leave marks.
3. Soft light is your friend. If you're relying on ambient light, get a scrim up.
4. Personally, I'm a big fan of a limited DoF for boudoir shots. This is especially true if she's had 4 kids and is 40 and could perhaps lose 20 pounds.
5. Agree with the advice about "look sexy." Tell someone "look like you have a secret that you know and I don't." Another is "look shy". Or "give me just a hint of a smile."
6. For new models, extending hands and feet won't come naturally. She'll often ball her hands up in to a fist and flatten her feet. You want to extend both as a way of creating long, flowing, lovely lines. And give her props to hold (a rose, a champagne flute, uh...a snake). You know a potentially great prop to use (with the snake)? A shiny red apple.
7. If you're really going to go with the snake, my advice would be to go for demure/implied nudes. In other words, she's nude but between the pose and the snake, nothing is showing. That can look artistic and clever. Otherwise it's just "hey, here's someone who owns a snake!"
8. For lingerie, think lacey. And matching (i.e.: top and bottom are the same color). Have some fabric to partially cover the model. Think of a bra or camisole strap that is partially off the shoulder. If the model is going to put a thumb into the waist band of her shorts/panties don't have her exaggerate it (like "let's see how far these suckers can stretch!".
9. As a general rule, think of "hiding" the lingerie in the poses. Have the model peering around a bedroom/bathroom door. Peeking out from under some sheets. Wearing a man's dress shirt that is mostly open. So we catch only a glimpse of lace and skin. You're not shooting a lingerie catalog, you're trying to create a look and feel to the pictures...something that is romantic and a bit sexy but not too extreme. Unless of course you're using the term "boudoir" to mean "indoor glamour nudes".
10. Print out some sample poses to get you both started and provide ideas to riff on. If she has body issues, look for poses that minimize those. For instance, she's had kids (so perhaps has loose stomach muscles or stretch marks but also cleavage) than pose her on her stomach facing the camera. Large thighs...don't pose her feet to the camera (to minimize distortion) or have her holding some lace or silk fabric that drapes her bottom half or put her in heels (which visually lengthens the body). She's got tan lines, use some derma blend to minimize them. She's got a scar or two on her body...some strategically placed roses or fabric can put it in shadow.