Could do with some advice here, will help as there are lady riders here who can give me there view as well.
Last autumn my wife and I decided we would go out biking, so we could do something that we both enjoyed doing together. She also does no other exercise and we thought this would be a fun way to get fit together.
She used to do lots of riding when she was young, and we have often done rides in the past together (some over 20miles).
I thought I would start things off by a gentle ride round the local park. It's a 13mile round trip in total and I took it extremely slowly and patiently as she hadn't done any riding for a bit. She did this fine, although struggled up the first 'hill'. I suggested to her that her Shopping Bike she was riding wasn't up to proper riding, and I bought her a proper MTB a few weeks later, which she now loves.
We did this every saturday for about a month until she went off on one saying how she didn't want to have to do this every week and was getting bored of riding the same route.
So next time we went to the local common and did some more 'off road' stuff and she loved it. Did about 15 miles which again she did no problem.
Now the problem (?) is that she manages these rides extremely easily. Isn't tired at all when we get back. But she literally rides on the flat on the roads at about 8mph, so slow I am freewheeling and I'm still pulling away from her. Even mums with their little kids are overtaking us! When we're offroad though she seems to speed up a bit and keep up.
We went out again last week and I tried suggesting to her that she needs to go a bit faster as she is trying to get fit as well as going for a ride, but she went mental at me, said she was trying as hard as she could and it was because I ride all the time that I was finding her slow. I know she can ride harder though as she gets back and isn't tired at all, and she's not even out of breath as she rides along.
So what I'm wondering is am I being unreasonable, or do I need to somehow need to keep persuading her to go just a little quicker on the flat so we can ride together?
Anyone else been in the same situation?

