Gisele Bündchen I Need Someone Who is Consistent ... Possible Hint at Reason for Tom Split???

Gisele Bündchen may have just dropped a massive hint about what led to the breaking down of her relationship with Tom Brady and what appears to be the end of their marriage.

Gisele was on Instagram Wednesday when she commented '\ud83d\ude4f\ud83c\udffd' in response to a post that read, "You can't be in a committed relationship with someone who is inconsistent with you. Read that again."

The message is certainly interesting -- especially because many feel the beginning of the end of the couple's marriage was when Tom un-retired.

Of course, it's possible Gisele felt Tom was "inconsistent" in his commitment to his family ... first saying he was stepping away from football, only to announce he was…