Great questions. I'm not even close to being a doctor, but as a woman here's my opinion.

First up, unless the dildo is very bendable, soft, small and easy for her to move around in - stand up, sit down, bend over - I'd skip it.

While they look like fun, some of them can be pretty darn uncomfortable and can cause some bruising even when a woman is at the right angle. They can also be hard and unyielding, which makes for a very painful time.

For long term wear, I would worry about things like bladder and yeast infections. The area between a woman's legs is meant to breathe.

For a once in awhile scene, it could be very, very not.
Say, you going out to dinner, a movie, shopping.
Not for too long a period of time, but enough to bring a thrill to you both.

May some of the doctors, nurses and others in the know please chime in on this thread? Thanks in advance.