I've witnessed first hand a baby being born with withdrawals from marjuanna. It just broke my heart, she never asked to come into the world this way.
In my opinion both are bad and both can harm the baby.
Maybe this lady should take a trip to her local hospital and visit Special Care Nursery, I hope there aren't any babies going through withdrawals but if there is I would think it would be enough for her to give up at least one of her uses.

Regards,
Dianne