Parents are often wary of announcing they are expecting another baby to their children, but fortunately this is not a problem we’ve had with Jack.

My wife is just over three months into her pregnancy now, and it’s been one month since we told Jack who – incidentally – has been asking for a brother to play with since Christmas.

When we first told him, shortly after our first scan, he was very excited, although disappointed to hear it wouldn’t be coming out immediately.

The last few weeks have been equally delightful. Jack insists on talking to my wife’s belly almost daily, and this usually takes this form: “Hello baby, it’s your brother, Jack. Are you coming out soon?”

As my wife’s bump has progressed into something altogether more noticeable, Jack has looked on in awe.

Earlier this week, when getting dressed one morning he even started strutting around the bed with his hips thrust forward, legs spread wide.

Initially, I thought he was trying to show off his belly button. But then he said he was trying to walk “like a pregnant mummy”. Alex Reid, eat your heart out.

Although we do expect this enthusiasm to wane when Jack realises how boring baby’s can be in their first week from a toddler’s point of view, he’s still really keen to get involved.

So far, he’s insisted on helping baby bath, change its nappy and give baby the occasional bottle of expressed milk.

Not only has he promised these thing though, he’s also started practicing them on his two toy dollies.

For example, when we were trying out buggies earlier this week, Jack insisted on bringing one of the babies along, wearing a kitchen towel nappy we’d wrapped around in the morning. Baby not only had to come with us though, he also had to try out every buggy in the shop.