Peter's mother had reacted to seeing Magneto on TV by getting drunk, which wasn't a surprise.
What was surprising was the topic of her rant, a vehemently passionate speech about - the importance of using protection?!
"... Mom," said Peter once her lecture wound down, "what brought this on?"
"Of course he also killed JFK, on top of everything else," Marya muttered. Her thousand-yard stare was fixed on the television behind them, which now showed a reporter discussing Magneto's alleged role in the JFK assassination.
"The bullet may have curved," she said, "but his sperm certainly didn't."