Should I be a step dad (M32 No kids)

So I’ve got my first GF! I’m 32 and she’s 30. She has 2 children. 1 disable and 1 “normal”. I love this woman! We been together for 6 months. She amazing! I’ve had sex in the past but never a Girlfriend. I know I’m getting older but I only make 60k a year & with a disabled child, she wants to be a stay at home mom. I feel so attached because she’s the first girl I’ve ever “came” in. (I’m really careful about my finances) but I’M not where I want to be right now. I’m a truck driver so I’m only home one week a month. She separated but working on getting a divorce. I spend about $1200 a month on her & her kids. Now she wants to have a baby with me (my 1st child) but that would mean 3 kids. I’m so new to this & I feel like I’m in too deep. I love her but I just need some imput