The mother of “Hell on Wheels” killer Mackenzie Shirilla is whining about how her daughter is “struggling” and putting on weight in prison — while insisting she still loves the boyfriend she murdered. Natalie Shirilla complained to the Daily Mail that her now-21-year-old daughter is “mentally struggling” while holed up in the Ohio Reformatory for Women in Marysville, where she is serving two concurrent sentences of 15 years to life for killing boyfriend Dominic Russo and a friend in 2022 . “She’