@Babyblues209
No, no, a million times no. Don't DO it.
Why on earth would anyone want another child, when they're in their FORTIES, when they already have 3 kids anyway? (Who are almost adults!)
You're just setting yourself up for another 2 decades of school runs, school politics, school gate mafia, financial struggles, being tied down and unable to just pop off anywhere, having to always put someone else first, not being able to travel abroad so easily, having a messy house, never having any 'me-time' to yourself, and tying yourself down for ANOTHER 2 decades. WTF WHY?
And don't think for a second that your partner will do 50% of everything (childcare, school runs, housework etc,) because they never do. No matter how many people say on various forums that their partner/husband does 50% of everything. This never happens to any woman in real life. This will be mostly down to you, - YOU will be taking on the responsibility. FOR the next twenty years. So until you are a pensioner basically! You will also have a teenager when you're knocking the door of SIXTY. Fuck that.
Personally, I would never have a child over the age of 40 anyway, even if I had none already, for ALL kinds of reasons. So many reasons not to, and even moreso when you already have kids.
Wanna make something with your new partner? Make a quilt together!