Here is the original item:
Whenever one of her six cats jumps on the kitchen
counter,
(A) Lorna
just sighs. (B)
And reminds herself that everything tastes
better (C)
if there is a little cat hair in it.
You wanted to do this:
Whenever one of her six cats jumps on the kitchen counter,
Lorna just sighs. And reminds herself that everything tastes
better,
if there is a little cat hair in it.
Adding a comma after better is an error. Rarely do you use a comma to separate a concluding subordinate clause from the main clause in front of it.
You might want to review the rules.