Hi James, at a guess I would say about 12 years old - you've read some of the threads so what's your guess?
I agree my wife and are always surprising people when they learn we have 4 kids aged 18 down to 10. they always suggest we don't look anywhere near old enough or that we are 40yrs old. I think its more my wife than me this is probably cos we only met 4 years ago and got married less than 2 years we haven't had chance to let the 4 kids or each other speed up the process