Another implication Rachel made was that she didn't want to and/or couldn't bring up the baby alone, so was willing to let Tony have an affair if it meant he could deal with his grief and still stay with her. It reeks of desperation, and resembled the Kim situation where she was so desperate to have a baby with him and cling to him even when she knew deep down she was losing him.
I like Rachel when she's a strong, independent, supportive and free-thinking woman, not when the whole baby thing rules her life and she becomes a blithering mess who can't think logically.
