I guess there is good advice here. Take a break, wait for my son to grow a bit then take him with me
I does sound as though you are at a stage in your life where you 'should' take a break from flying. We hope that break will be temporary: A lot of people don't even learn to fly until their late 40s / early 50s - once their children have left home and they have more disposable income and time.
Working on the assumption that you are likely to want to return to flying in the future then make this easier for yourself by not starting your break until you have the most up to date / longest lasting qualifications:
Licence - Make sure you have an EASA Part-FCL PPL (which is valid for life).
SEP Rating - Revalidate it before your break. Valid for 2 years, can be renewed without CAA involvement (or cost) for 3 years beyond that.
Night Rating - Valid for Life
IMC Rating - Renewable by test at any time. Not worth doing before your break.
Class 2 Medical - As you are over 40 this would only be valid for 2 years so probably not worth doing before your break.