I would be surprised if we could find any sensible person disagree that family voting is wrong. Clearly an individual should be free to vote for whoever they want without fear of recriminations.
Whether, this is a thing that’s happened is a different matter entirely.
It's a really poorly drafted law. Covers in person voting but not postal voting.
Here's the offence:
Influencing voters at polling booths
(1)A person who—
(a)is with another person at a polling booth, and
(b)intends to influence that other person to vote in a particular way or to refrain from voting,
commits an offence.
(2)A person who—
(a)is near a polling booth when another person is at that booth, and
(b)intends to influence that other person to vote in a particular way or to refrain from voting,
commits an offence.
"Influence" is ill defined and overly broad, which means it gives prosecutors a lot of discretion.
For example, usually people in a long term relationship will have similar political views. They may have conversations about who to vote for and may convince the other to vote in a particular way. That would be legitimate in my view, and presumably other people's view too.
When does legitimate influence become illegitimate?
It is already a criminal offence to influence someone's vote in and around a polling station, or to discuss political matters.
Family voting was reported in the Runcorn by election which Reform won by 6 votes. It occurred at lower levels than in Gorton, but could have swayed the result in Runcorn. I object to Reform (and other commentators) politicising this matter in relation to a by election with a significant Muslim population, with little to nothing said about reports in Runcorn.