Ex partner introduced our son to a “friend he’s taking things slow with”

How many children do you have?

a few days later he’s posting her on Instagram
why are you stalking him on social media? That will never end well.

It's understandable you are miffed, but there's nothing you can do. He's an equal parent, you do not get to tell him how he runs his life or spend time with his own child.

Is your ex in the habit of hanging out with murderers, drug pushers and pedos?

How can you be entirely confident that one of your friends isn't a drug pusher, a murderer, or a pedo? Should your ex be allowed a veto on who your child gets to meet when he is with you?

Why are you asking your ex about his relationship status though?

Sadly you don't get a say but I think you should have been dating at least a year before introducing

Sometimes people make it impossible for us to do anything but lie. If he'd said she was more than a friend, you would have tried to forbid her from spending time with your son. He denied she's more than a friend, and you want to nail him for lying. There is no way he can do anything but lose in this situation.

I don't even know what "taking it slow" means; maybe it means something different to you than it does to your ex. Is he posting her on instagram as his official new girlfriend? As a friend he does weekend stuff with? You can't expect him to see everything the way you see it, and if you're going to lay down the law and tell him his son can't meet his friends, then of course he is going to lie. You have left him no option, and to be honest he probably thinks you're over-reacting.

Why can't he just focus on his son?

And keep his private life separate?

Why are men so eager to set up a new family unit? Its like they have a default, make a family, break a family, build a new one, getting carried away with the idealism of the new little family, dump, start again.

Was he a good partner when you where together. Because if he was a lazy sod, he just wants a women around to play mum.

Sorry didn't see your more recent post. He sounds like a fool.

No right to any information?! Where’s the safeguarding here?

You get absolutely no say in this. None.

You can’t control his behaviour so there’s no point in stressing about it.

I would respond to DC saying “that’s nice, I hope she’s kind to you.” Leave it at that.

The comments might be 100% against OP, but I guarantee that no one would say her ex could, or should, interfere.

I’m surprised by some of these comments. YANBU, obviously. It’s irresponsible of him to introduce your son to women he doesn’t know well himself. It sounds like he has form for this which has led to upset for your son in the past.

There’s no benefit to your son at all of meeting his new fling.

If your post read “I’ve recently started dating a new man, AIBU to introduce him to my son?” the comments would be against you 100%.

An the alternative is you giving him grief so I completely understand why he’s lied

at 7 as long she’s introduced as dad’s friend rather than a new mum I think you going to have to get over this

When your son is with you - You get to decide who you introduce to your son. Your ex has no right to veto, you don't have to tell him anything it’s none of his business

the same us true for your ex.

He gets to decide on his time and you have no say and no right to any information- it’s none of your business.

Honestly OP you need to let this go. I totally agree with a pp who said that using the fact that your son liked the dogs of a girlfriend he had 2 years ago and who he met just a few times is really scraping the bottom of the barrel.

Have you got some nice fun things planned to do this week-end? Maybe focus more on yourself.

I totally get you OP.

Introducing boyfriends and girlfriends to your kids at the 2 week point shows shows an unpleasant disregard for the child's feelings at best. At worst it's dangerous. Especially the other way around - if it was random men overnight after 2 weeks.

You're right to be pissed off. I guess all you can do is as another poster said ask if he wants a few extra weekends to his self so he can bang on with his love life (for your sons sake) and at the same time perhaps help your son understand that this new woman (and future women) may not be around for ever. Be friends with her but don't get too attached. Help him learn to guard his heart ...

Is it annoying that your ex is introducing your kid to multiple women... absolutely.

But the reality is, this man is your child's father and has every right to date who he likes.

Stop following him on social media, stop asking him questions about his love life. He's "lying" to you because you're interrogating him and sometimes he probably doesn't have the answers and so you deduce that he's lying.

When you become less involved, you'll feel a lot lighter.

Whether you’re happy is neither here nor there. He is free to date whoever he likes, and introduce them to his child whenever he likes, just as you are.

You sound….. intense. He is not putting your shared child in any danger and so therefore it really isn’t your business.

And so what if it is?

He won't be the only adult to look back and think their parents had a lot of partners 🤷‍♂️

I think this is far more about you than your son.

It’s a hard one because I get why you’re unhappy- I would be too- there is literally nothing you can do about it. He’s his dad, these are decisions he is allowed to make.

It’s really hard OP, I understand why you’re uncomfortable him choosing to that and I completely agree with you, but unfortunately I don’t think there will be much you can do.

As co-parents you can only go so far to agree on an approach, it’s always going to be more challenging as exes, he hasn’t done anything illegal, it’s a parental decision he is allowed to make.