How have people found having a second bio child when they have 1 and 1 step child?

[HardRockLife]

My broodiness has been through the roof lately and me and my partner have 1 child each from previous relationships. We have my DD(4) all the time with 0 involvement from Bio Father, we have my DSD(7) 50:50. It feels like my body is screaminggg to have a baby with my partner as he is just absolutely amazing as a partner and a dad to our girls, he’s of the opinion that whatever I want/need to do he’ll support me 100%. He is also self employed and is flexible with work so that one of us is always always here for the girls.
We have a 2 bed house and the PERFECT neighbours that double as best friends next door. The girls bedroom is big enough to split in 2 comfortably - but I worry that having a third will mean they won’t ever have their “own space”.
We also don’t have super involved parents of our own, I’m an only child of a single mum recently diagnosed with MS (and possibly going through menopause) and my partners parents, his dad is quite old and his mum is in the throes of menopause - they are also moving about an hour away soo .
So I wanted to know if anyone in a similar situation has had a Third child and how the transition was and was it easy/hard? How did you cope with little grandparent support? Did you feel that you had to move? What about Car space, holidays, relationships with your current children - did that change?

Thank you 🩷
One broody Mum.

DH has DSS 11 and 8 and I have BS6. Been together 6 years, he’s the only father BS has ever known. The older boys are here 50/50 and we blend well. We also have DD who’s 9 months and due this summer with DD2.

The kids absolutely dote on and adore their sister and asked us for years to have a baby. They’re very excited for the upcoming baby.

In terms of practicalities, we bought a 6 bedroom house before we even tried for a baby. Then each boys have their own room (though currently the 8 and 6 year old share out of choice and one bedroom is empty). We use the spare rooms now as a guest room and office but they will eventually be the girls’ rooms. DH has an 8 seater car, I have 5.

Holidays are fine. We alternate one big family vacation each summer with all the kids, the next summer their mum often takes them away and we go somewhere less big with my DC, though as they get older we are considering further flung vacations. DSC don’t feel excluded as they’re often away abroad somewhere fancy with their mum and reckon DS and DD should be allowed to go with their own mum. I’ve lucked out a bit in that my step children never had any hesitations about blending and are very comfortable with me and in our house and their dad is extremely hands on.

It seems like you have a good foundation for having another child.

You and your partner have a great relationship.
You and your partner both want to have another child.
Your partner has a flexible job.

Some questions (to ask yourself and your partner, you don't have to write the answers here).
Do your daughters get along with each other?
What is your economical situation like?
Will you and your partner have to support your mother or his parents in the future?

Our girls get along most of the time!
We certainly aren’t well off, and sometimes it feels like fire fighting with paying the bills and my partner having to work a little extra to cover them.
In regards to our parents his parents actually messaged today saying that some buyers pulled out of the house they wanted to buy so they will be staying put. My Mum may need supporting at some point but she’s currently only mid forties, her MS seems to not be progressing at the moment, menopause may be on the cards though as she seems a little off at the moment.