I've been dating DP for 6 months now and he has a 10 year old DS who he sees EOW. Mum doesn't allow overnights so contact is at hers and I've never met the son or have any plans to.
We've talked about moving in together - we both live alone in places we used to share with exes and the amount we spend on running two houses and cars when we only live a couple of miles apart, spend 4/5 nights a week together and use each others cars interchangeably is absolutely absurd. Neither of us can really afford to save much in the current set-up. We've spoken about moving in together around the 1 year mark.
However I suspect I still may not have met his child by then. His ex is apparently very protective and hasn't allowed the son to meet any of DP's previous GFs. He reckons it might take a couple of years and even then the ex is likely to freak out about it. She sounds slightly irrational but having been raised by a single mother I try to default to being sympathetic and seeing her POV. DP understandably doesn't want to upset her as they're getting on better than they have before which means he gets to share a lot more nice family days with them.
I had a horrible, horrible step mother who I hated and I strongly suspect hated me too. I couldn't bear to be the evil stepmum. Honestly I'd leave the relationship if my existence upset his child, I just couldn't put a kid through the feelings that I felt. I would never ever behave the way my stepmother did but that doesn't guarantee his child will like me.
Would it be fucking stupid to move in with him before meeting his child? At least living together I'd have the opportunity to save a deposit in case I needed to move on, at the moment I'd be fucked if my landlord kicked me out. His child's approval is non-negotiable for me to continue in this relationship long term - I refuse to be a factor in damaging their relationship.