Steel, Lies, and Payback

My roommate begged to swap mechs. Just as I was about to agree, a mysterious voice warned me: she'd damaged it—and she was carrying my boyfriend's baby. They planned to stick me with a $10 million repair bill. When I refused, my boyfriend and teammates called me selfish, demanding I climb into the cockpit. But hadn't they ever wondered why the mech's owner and I shared the same last name?