Thank you both your experiences. I am pretty sure he won't harm them, he was so gentle with her when I first brought her home at 8 weeks and she loves him to bits so I don't think she will be stressed by him. From your advice I think I will send him to the in-laws for the first night (as there is no way he will allow me to be in with Jess if he is not he follows me everywhere) and let him meet the puppies the next day under supervision and then take it from there.

I expect (and hope) I will have lots of questions over the coming weeks, so thank you for being here to ask.