Debating whether to have a 4th child or not !!

yaya mustan
I have two beautiful sons who are almost 10 and 8. I am expecting baby number 3 who is also a boy due in January. The reason for such a big gap is that I had a huge accident 4 years ago and I was not ready physically and mentally to get pregnant. Now that I am pregnant I think it's very unfair of my 3rd child to be raised alone. Both my older kids are extremely attached to each other and do not live apart. I know they will love their baby brother but my son won't have anyone to play with at home. By the time he will be 5 years old my oldest will be in high school. I'm finding good reasons to have another baby after this one and I need some to convince my husband for another child. I'm 34 so I am comfortable trying again in 2 years. Is anyone else in same shoes as I am ???