[Big Sexy]

If for some odd and unknown reason a guy ejaculated in some bath water and a girl got in could she get pregnant from that?

No. It's not possible for a woman to become pregnant if there is ejaculate (cum) or pre-ejaculate (pre-cum) in the water of a pool or bathtub. Sperm survive well in moist, warm places that are around body temperature. Pools are too cold, have too much chlorine, and too much water for sperm to survive.

However, pregnancy is possible if cum or pre-cum comes into direct contact with a woman's vulva or vagina during sex play — in the water or on dry land.