My wife is English, my 2 girls were born in England ( but refuse to accept ANY of the englishness they have, they are 100% Welsh )
Most of the girls friends are English and support england, which is why the last Euro's was great with the Welsh Success, though to be fair, close to 90% of our friends were all supportive of Wales, they were well chuffed we were doing well, i had a stranger ( turned out to be a dad of one of the swimmers at our club ) come upto in town and shake my hand and say " well done last night " ( surreal )

the girls were saying over dinner that they were going to support the other teams England play, I explained to them it is much more fun to watch them get to the 1/4 finals and then lose, ideally to Germany , youngest pointed out, it a risk they would win that and get to the semi, she wasnt prepared to take the risk