Secret phone calls…

It is reasonable to have to consider how a baby is going to be supported, and maybe that has to be the first thing to take into account, for now.
It's why contraception is such an important thing for us to school our daughters on, as once you have a baby depending on you, it's all a lot more complicated.
So, maybe you have to make a plan, and maybe it will take a while to create the escape you need... So you decide you're playing a long game, you research your options, work out your steps and work towards to it gradually... Maybe your options will be within reach, maybe it will take time to put the things you need in place (housing applications, qualifications etc etc)...
Maybe some more knowledgeable folk will be doing in a bit to offer more advice than I can.
But stuck now doesn't have to be trapped forever.

Many a tragic novel is based on the human condition of being trapped by circumstance... Which tells you, you aren't the first person to be in this predicament, so don't feel hopeless. Luckily we aren't living in the age where you have to sell your teeth to feed your children (Les miserables)... There are less drastic options for us these days fortunately.

Why can’t he just go into a different room? Why does he have to go outside?

You don’t have to get over it.

You could leave the whole fucking dysfunctional disrespectful lot of them.

If this was purely about taking phone calls in private, yabu. I always leave the room to take calls ( as do dp and dc’s), Very normal in our house.
I have no idea why you are still in a relationship with this person ( after seeing your update re his cheating).

Another case of a weak man that puts his exs feelings and wants before that of his current partner. That lack of boundaries and bollocks is infuriating but add his infidelity it’s obvious you won’t trust him and with good reason. You said he slept with her numerous times, with respect and kindness, find the strength to know your worth and toss this one back. Maybe his ex will re home him

Why oh why are you still with him????

But what can he say?

DP: Don’t speak about TrinTrin like that
XW: Like what I only said she’s (preferred insult)
DP: Just give it a rest
XW: No, it amuses me

THIS

But, he was doing all this when his other two children were in the picture, living breathing in all their childhood innocence...
He was sleeping with their mum even though he had divorced her ... and sleeping with his new girlfriend at the same time... All while his first darling children relied on him and their mum, he took what he wanted and went where he wanted...
The cost to her (their mum) was irrelevant to him at the time, what if she had struggled to cope with the head fuck off it all, would his children have suffered if she had crumbled... He didn't think about that or care.

His latest child was never going to be his lightbulb moment.

You'll never regret your beautiful boy!
You'll be a wonderful mum and teach him to be a decent man.
People don't develop a moral compass if they don't already have one though. His boundaries will be porous, firm when it suits, slack when it doesn't or he needs comfort/is bored/resents something...
Some people live a lifetime with partners like that... It can be done, but it doesn't make them happy.
Some people make a trade off, the bills get paid and they turn a blind eye.
Life isn't always a bed of roses but if you find yourself in the manure, you either make the best of it, even though it erodes your soul... or you find a way out and seek peace elsewhere.

If he'd divorced his ex-wife and was seeing you, but still sleeping with his ex-wife, then he's hardly Mr Innocent is he?! The fact he's going out the house to supposedly speak to his children, because his ex has demanded it, is plain ridiculous! Unless he told his ex and children you were in the same room, how would they know?! Even if he Facetimed them, you could easily stay out of the cameras way and be in the room or another part of the house, and again unless he told them, how would they know?! It makes no sense to me at all. He could quite easily go into the bedroom to speak to his children, there is absolutely no need to go out the house at all. I'm sorry but I think the reason he goes out the house is to speak to his ex privately, quite possibly before he speaks to his children (if he even does!). The fact he's cheated on you with his ex previously, speaks volumes, as to the secrecy now!

She has the upper hand, she slept with him when he was with you, she dictates that he can't speak to his DC (and probably her) while you are in earshot, there is probably more going on.

He might not still be sleeping with her but I bet there are mixed messages going back and forth between them. I'd be checking his phone TBH. I bet she slags you off to his kids all the time too and tells them she can't be with Daddy because you are - you will become the villain in this story however nice you are. How are they with you?

And why exactly are you keeping him around? Seriously?

Do you think he'll change? Do you think she'll change her ways? Do you believe it's all over between them?

Yes it’s all a bad picture op.

You play in mud, you get spattered.

I think the phone calls are the least of your worries.

No I hadn’t.

I’ve posted my own update having done so.

Op sadly no he isn’t and he is back to his old ways. .
Just end it and send him back to her . Honestly he’s not worth it

Sorry, that ship's already sailed

So she insults you and he sleeps with her multiple times. Even if they phone with you sitting right there you're always going to be wondering if he's seeing her on the side. The phone calls are the least of your worries