[Closed] How to convince someone who hates mountain biking to, er, not hate it?

Despite my best efforts my Mrs. absolutely hates the idea of mountain biking. I'm not one for forcing my hobby on others, but she has recently said she would be interested in getting involved to a) get fit and b) share a hobby / spend time together etc.

I've taken her twice in the past 4 years and to be fair they were disastrous. The first time was a disgusting day in Gisburn, she couldn't get going on the wet bottom section and worst of all her chain kept slipping and jamming (from a hire bike). The second time was a quick jaunt round Phillips Park. I made the mistake of taking her down the red - she screamed down the hill and was pretty annoyed at me. My bad.

So basically I need tips, or a programme of progression for someone at the very beginning of riding a mountain bike. I just don't trust my judgement.

She doesn't want to join a group ride or go on her own - so it's down to me.