My friend's twin and pregnancy

Well looks like it's happening again. My friend told me the newest about her twin sister *the one who kept thinking you could get pregnant from humping a pillow/stuff animals and stuff awhile ago*. Now she's freaking out because she feels a heartbeat in her stomach. Isn't that noraml? I guess she thinks that's a baby's heartbeat or something and is now going into the "see I was right you can get pregnant if you hump a pillow or stuffed animal" thing. She
S also freaking because her stomach sorta hurt for a very short time today. I mean that could of been what she ate for dinner but agreeing with her or anything. It's driving me and my friend completely crazy. We've tried to tell her that it's impossible to get pregnant that way since pillows/stuffed animals don't produce sperm which is needed to make a baby, but she still continues to go on and on about it. She's way paranoid about it. My friend said she's been like that ever since she got her first period. She thinks that since she's a woman now, she'll get pregnant easier I guess. Any advice on how to get it through to her that she's not pregnant and can't be by humping a pillow/stuffed animal?!

Well tell her to take a pregnancy test.. that PROVE to her that she's not pregnant -- if it keeps going on tell her to go see an OBGYN and let him/her explain it to her. Also let her feel your heartbeat through YOUR stomach, because it is perfectly normal !!

me and my friend both let her feel that through our stomach but she said WE were pregnant! hopefully she'll find out one day that she can't get pregnant without sperm...
but thanks for the advice dillonsmommy1023