If Clause and Commas

I know an 'if' clause at the beginning of a sentence needs to be followed by a comma, and an 'if' clause at the end of a sentence does not. But what about one in the middle?

For example: "She couldn't decide whether she watched him because she wanted to keep him safe, or because she was afraid that if she let him out of her sight, he would break something."

I am unsure as to whether there should even be a comma before the 'or' and after the 'if' clause.

Any help would be awesome.

Thank you both for your help!