She'd have been hauled up in front of the court for doing it, yes.
There's a reason you have to be over 18 to star in porn.
The law divides children into many age categories. Such activity with with anyone under 13 is considered rape. Where as 13-15 while still illegal it depend upon both participants age and circumstances how it is treated, adults tend to be convicted with custodial sentences while children in the same age group don't and children in the 16-17 group may get lesser sentences/cautions, but can still be put on sex offenders register.
16-17 legal as long as the adult is not in a position of trust over the minor.
It's perfectly legal for a 100 year old to have sex with a 16-17 year old as long as they don't have a position of trust over the minor and of course willing for both participants. It may be odd and it probably be just as concerned about he 100 year old as the child.

Also dictionaries are just someone option on what a word means, that's why there are many versions of dictionary, words predate dictionaries and definitions are subject to debate.

But if you continue to consider any sexual activity between and adult and a child of the ages of 16 - 17 as paedophilia, then maybe as many half the UK population would be peados.
