There is so much confusion about the definition of a family today where secular society, governments and politicians have made up their own definitions, and so this question is not quite as simple as it might at first seem.
Marriage and the family have been generally accepted for a long time that they are the building blocks on which a stable society is founded. However, attitudes have changed; the liberal society with its permissiveness has invaded every nook and cranny of society and, instead of looking for inspiration and direction from the Word of God, most countries now find themselves overtaken by secularism. God is generally excluded from any discussions about right and wrong, with man making up his own definitions.
One UK politician said that a family was any group of people who lived together. That was something that he thought up without consulting the Holy Bible. That means that he (and others) would consider that homosexuals living together would be a family, as would be two lesbians. Co-habiting would also fall, erroneously, into that same category. Any group, however made up, would be a family! And politicians who make such ridiculous assertions are those who frame our laws!
On the BBC…