Sometimes it's to try and "turn the tides" in a fight and make you feel bad. It could also be because when your upset you may say or do things that make them upset.
because they could be upset or mad
Because women have this thing for not liking men from keeping secrets from them, however, when it's the other way around, they sort of laugh at it and continue to not tell you. So... I would tell her because we don't seem to win.
Why would you even want them to trample you? I wouldn't get them mad if i were you. Girls can be evil.
Perhaps she is afraid her parents will be mad or that the person she is lying to will be upset about her being pregnant.
mad
Mad as a wet hen is a made up phrase which is referring to someone being really angry or upset about something.
Depends on the guy, he could be saying that because he isn't mad just upset, he could be mad but doesn't want to upset you, or he could be saying that because he isn't mad or upset you just took his impression the wrong way.
angry or upset
The abstract noun for anger is "anger." It represents the emotion or feeling of being upset, mad, or irate.
angry, mad, or upset
Very mad or upset.