To add another perspective - my Dad was gay, he and my Mum remained married until he died. He was born 20 years before Philip Schofield, but they were both they were both born when gay sex was illegal. Even after the 1967 Sexual Offences act, there were many men who were prosecuted for gay sexual offences. So they grew up in a climate where being gay was seen (by the majority of society) as wrong, at the very least something to be avoided and hidden away.
I'm fairly sure that both my parents knew that Dad was gay (or at least bisexual) before they married, but they loved each other and wanted to build a happy family life together, which they did, at least for a while.
My Dad went out and sometimes away on holiday without my Mum, but this didn't seem particularly odd. Their marriage had low points, particularly once I was in my teens, and my Dad had a very close male friend, and they almost split up a number of times, but the reasons why were never acknowledged. This carried on until my Dad suffered from dementia, meaning his behaviour changed, and my Mum had had enough - she didn't want to look after him and overall the marriage wasn't working for her. That was the only time that it was ever mentioned that my Dad was gay, as I think my Mum didn't want people to think badly of her, dropping her ill husband, so felt it justified her actions. I refused to discuss this with her, I've never wanted to hear the details of my parents' relationship, rightly or wrongly.
I was certainly brought up to be completely open minded about people's sexuality and indeed whatever choices other people make. I supported my Mum's choice to end their relationship, and their joint choice to remain married but living separately. My Mum was devasted when Dad died, she mourned for him as anyone would whose partner since their teens had gone. She inherited his pension, which is only right, as her career suffered, whilst his thrived, during the years when my Mum was looking after young children.
What point am I trying to make? I guess that we shouldn't judge PS and his wife for their decisions, which they made in a very different climate to today. I'm sure that had my Dad been born 60 years later, he would have been happily gay, probably with a long term male partner. But he and PS both made different choices that worked for them, and for their wives, at least to a certain extent. They had good reasons for not publicising their sexuality, and people should try to understand them.
NB not excusing the grooming aspect of the PS story, but aside from that, I feel a parallel.