He is a trier.

He may have self esteem issues and desperate to be accepted. If you laugh behind his back he must pick up your signals - and there is nothing more hurtful to feel like the fool. As Glenfinnan says he's overcompensating to impress YOU. Wise advice from her and others here. With more time and gentle reassurance he hopefully will settle down. Be thankful he loves and looks after DD and DCG. I'd be tempted to expose his 'expertise' or challenge some of his more stupid remarks but it would be a hollow victory and upset DD.

I had an aunt who was quite ill-educated but she always said that she had met 'Mr' or 'Mrs' or Sir' or ''Lady' 'someone' who enjoyed talking with her because she knew so much about most things. She truly believed this, and thought we also believed it. It's just fantasy, but I know it can be very irritating.

He obviously wants to impress. Keep reassuring him that all you want is for them ALL to be happy as a family, he will calm down!

I know people like that too Nanawind and it is irritating. However in this case it sounds like he is doing his best and maybe feels he has to impress to make his mark in the family.
Your daughter is happy and the children so bite your tongue (I find this hard ) and leave them to it. You will always be there to support if things go wrong.

I'm with Bluegal. Men with good intentions, want to be able to prove how capable and useful they are. Even if they actually aren't . As long as your daughter and children are happy and you already see that. Better to vent on here than to them.

If he’s a good dad, loves and provides for them and they’re happy. All is good. Live for the moment, and be there if it goes pear shaped again. That’s all any parent can do.

I think most people know somebody like this nanawind. As you say best to grin and bear it! Your daughter may tire of it or continue to overlook it on the basis 2 out of 3 ain’t bad ?

I think its the norm for people to move on quickly from relationships.My own daughter did just that and for the first time in her life we disagreed .I have to admit 8 years down the line ..that she made a good choice ,her 2nd husband is a keeper ,brilliant with her 2 from her first marriage though prone to spoil their joint child.His first and only.Apart from that he's a vast improvement on no1 who cheated on her with anything in a skirt .Having said that we still have a good relationship with him too..he is our GC's dad after all

Don't take your eye of the ball though, Nanawind. Your DD quickly entered a new relationship so she's hardly likely to admit to any mistake she may have made. Pride will often lead to people over compensating for a partner's behaviour.

Hopefully they are all happy but don't dismiss your gut feeling.

Oh we do love him in a funny way. We in the bigger picture are no body. As long as he loves and takes care of them is all we want.

Your daughter loves him, the children love him,he loves them, this is what is important, it must be difficult for you but for your daughter and the childrens sake , grit your teeth and accept him as he is. X

Ah, I suppose you could try to see it from the point of view that he must look up to you to try so hard to impress.
It would really get on my wick though, and I probably would end up saying something.
I suspect it may be because I'm a bit of a "know-all" myself.

He loves her so much, in fact he worships her. He is so much better than their own dad. We think he tries to impress us with his opions.
We don't need to be impressed as long as he takes care of DD and DKs that's all we ask.

He sounds an absolute pain in the proverbial. Your DD must see something in him.