MJ wasn't happy about the things that she had to tell him, but she knew that she wasn't exactly done. She wasn't going tell him everything, about her falling off the tower or well, that sort of thing, but there was still Ned's new ability and the other Peters.
She shook her head fiercely when he mentioned putting them in danger, "Peter, there is no way that we were going to let you do anything by yourself. That's not what friends do." She told him firmly.
"When we saw the news... Well, Ned had been fucking around with the Sling Ring, and he managed to get ahold of a Peter Parker... but it was a Peter from another timeline... and then another. Eventually we just... went and found you were we thought you might be. But you knew those people would die if we sent them back without helping. So, we knew we had to."