Selfish to have dc with a 15+ year age gap?

[RosiePozie]

I had my first dc at 18 and he is now 14. I’ve always wanted a second child but I ended up single for most of my twenties... I am now nearly 33 and am in a great relationship and the subject of having dc together has come up.
Someone at work told me I’d be selfish to have one now as my first dc will have exams pretty every year for the next few years and he’ll need a stable, quiet environment to study properly and generally be available for these turbulent teenage years and not have me distracted by a young child.
Has anyone gone through this?

I had my 2nd baby last year at 35 and my daughter turned 13 the following week after he was born. She adores him x

I am currently 10 weeks with baby no4 so due in September ... I have a 17,16 and 9 year old ..... ignore her , she sounds jealous