You don't have to use the cone.
Just go buy a baby onesie and put it on her.
If she tries to get through the incision through it you will need to go back to the cone.
Someone on YT suggested that the onesie should be put on backwards (so the snaps are on her back, not her belly). This way the snaps don't irritate the incision and you can unsnap, bring around and resnap on top when she needs to use the bathroom.
Is she on pain med?