Board Thread:General Discussion/@comment-33053086-20180201061103/@comment-25936766-20180405214712

Assuming Weiss wasn't lying her ass off to Yang or remembered something terribly badly (she was 10 at the time, so 8 years before Vol.5), Jacques never loved Mama Schnee, but she only found out 10 years after Weiss was born.

And at that point in time Winter and Whitley were already born (Whitley doesn't seem like he's much younger than Weiss. 3-4 years younger, top). So it's very unlikely any of the W Schnees is a bastard.

Retconning that info to make any of them, not necesarily Weiss, be born out of an affair, feels just plain cheap and unnecesary. There's no need to turn Weiss's life-story into a soap opera.