stepson

Definitely support whatever your husband wants to do. I’m sure there’s loads of estranged parents who would love to be in his position.

It’s very hard to admit your were wrong well done that young man for holding out the olive branch even if it was him in the wrong
Your husband and you need to forget the lost years and make a fresh start
It’s not your place to be angry and if your husband wants a fresh start with his lad it’s up to you to support him whole heartedly and forget the two years.... it’s gone hopefully not to return

but if he feels his father neglected him, then his behaviour is understandable, if hard.
why do people seem to dismiss other' feelings when they express them, why not discuss the matter.
you see the effect the estrangement had on your husband, and being protective of him, are angry about it. but maybe the son's mother saw the effect that his father's absence had on the son. both hurts.

I would support my husband too

Your husband is probably so glad that his son has contacted him. Make your stepson welcome, give it everything you have and support your husband otherwise you may eventually find yourself on the outside.
Some mothers don’t protect their children from divorce happenings and hurt their own children by getting them on their side making the father the baddie which is wrong so don’t muddy the situation further and except your stepson with open arms.
Some women of divorced men with children act like a cuckoo in the nest and go all out to keep their husbands children away from their new husband. I know from experience that these women are rotten to the core due to their own insecurities.
You are sure of your husband’s love and can except that he loves his children too , yes ?

I agree with previous posters Willow put your own feelings aside and support your husband in this. It would be good if you could help your husband and his son reunite, if it doesn't work out at least you tried.

I agree with Silverdragon - maybe give your stepson a chance. I imagine your DH would be happier trying to sort things out with him. Estrangement can sometimes stem from a small misunderstanding. And you don't know what influence your stepson's Mum may have had on the situation.

If it were me I would support my husband.