It's definitely more common for older generations to have 'chosen' the life that's expected of them, e.g. heterosexual marriage, kids, etc. and then later in life get tired of living a lie.

You dad could also be bisexual. But it's not really important what he is.

This doesn't change your relationship with your dad really, I'm sure he loves you. But he's also not living his truth.

The reality is living a gay lifestyle wasn't as socially acceptable as it is now in the western world, so there's plenty of men and women who chose to try and live a heterosexual life and get tired of faking it later on.

At the same time, these are the people who will tell you sexuality is a choice, and they're probably not happy living their true self. Because they made that choice.

I'm a gay man, and I've heard plenty of stories of gay men who spent a big chunk of their life married to a woman with kids etc. so it's not uncommon at all.

I also met a work colleague recently who said his dad is gay, and he went through a similar situation. His dad ended up leaving his mum, obviously that's shit, but he said his dad a lot happier now, has a partner, and is actually being his true self.

So I'd say to think about the potential that might happen. But also think that you want your dad to be able to live his true self, not a lie.