Truth is, if the job itself is good then why not? You have good compensation, five weeks paid holidays etc. You're not doing anything illegal or immoral AND you get to relocate to a cool place in Europe.
On a resume just talk about the day-to-day activities you had to do. It isn't like you are an actor, you're a web developer - it doesn't really matter for whom.
About the comment about proudly telling your kids. Look at it in a different perspective. You are keeping millions of lonely men from blowing their brains out, you are helping provides millions more with a great stress relief. You're working for a legal company that is producing taxable revenue to build roads and other infrastructure projects. You will be doing a world of good for the world - the adult industry isn't a bad thing!
By the way, send me an email (in my account) - I have a cool idea for you.