Its gonna get seriously expensive for you.....
Lessons £
125 £££
Bigger bike £££££
New riding kit ££
A different bike coz she's a woman and doesn't like the first one ££££££
A road bike when she realises (a) that off road is hard work and (b) most of the time there's nobody swooning over that fact that she's a woman and rides that huge big bike. ££££££££
Levers, footrests, panels, 'bars, indicators etc to replace the damaged ones following the inevitable drops ££
medication for you as you watch her career around oblivious to the dangers and perils of riding a bike £
Two of everything whenever you go on the bike, and don't believe she will be fobbed with anything of lesser quality than yu have for you or your bike. Farkles x 2 gets expensive ££££££
Then she will suddenly declare she doesnt like bikes any more, they will sit in the garage unused for a year before you sell at a swingeing loss.
Trust me, I have been through all this and have the debts to prove it.