There were certain things that came with the territory of being a vampire.
One was the necessity to feed on the blood of others for sustenance. There was also the aversion to sunlight and holy water (though Vampirella was thankful she didn't share these and an assortment of other weaknesses). There were even perks such as the ability to turn into a bat, immortality, etc.
Becoming fat without warning or explanation wasn't one of them.
In fact, Vampirella was sure she had never seen a fat vampire before. Blood wasn't exactly loaded in calories so it should be impossible at that. Yet here she was, significantly overweight and squeezing out of her usual attire everywhere she could look. If she was scantily clad before, then she was practically naked now. She had the sneaking suspicion that some otherworldly magic was at play here.
It was time to pay Hellsing a visit.