A few random points maybe will help you get things clear
1. do you have other options of how women, or women that gorgeous
2. has she put the moves on you, or dress seductively , or shown any interest? or shot you down conditionally, in something that you can fix
3. If the family found out, how bad would this be? What would the consequences be?
4. Do you have any other fuck buddies, or alternatives for sexual fulfillment, such as massage parlours/escorts, or friends with benefits?
5.Suppose, she got attached, and you look like you want just the sex, wouldn't that be awkward
6. Would your "wife" be okay with this, if she knew about it? How about if you did it behind her back...
there is the typical "oh sure" a woman could give, but deep down inside I imagine it would hurt, which is why women hate porn, and rather they be your porn collection.