Desperately Seeking book where hero's ex says she is preg but it lying

[Jennifer]

hero goes back to ex when she says she is preg, she claims girl pushes her and causes a miscarriage when in fact she was never pregnant to begin with and was faking because she was jealous, I'm pretty certain the 2 girls get into a verbal argument on the sidewalk outside of maybe a restaurant

[Crystal]

Ok now i'm interested on this book. Do you know anymore details????