Hope the sex is worth it! The JW life sure won't be.
If she's a true "died in the wool" dub, there is no sex.....for now.......and next she'll be using that to further exert control over him later. If all it's taking is the thought of possessing a pretty smile and a tight looking ass....if that's all it takes for this guy to completely disregard what he wants to do with his life in favor of being led around like a high school knucklehead in heat, then by all means, go ahead, get baptised, and win that inconsiderate and conditional heart.
Just remember all the advice you were given when the mistique wears off.