Hello there,
Lupus isn't something that you can "give" to your child in the sense that, if you are pregnant at the time, they can't "catch" it. Lupus isn't caught at all.
Some young children do have lupus but it is very very rare (thankfully).
There is a hereditary element to lupus in that you have a slightly higher chance of developing lupus (5% of lupus patients children +/-) if you have a parent with lupus but that usually happens when that child is a lot older, even an adult.
It is also even more unlikely in boys. Some children are just very sun sensitive young. I remember my son was until he was about 4. Now he tans relatively easily though I'm still very careful about sun exposure as I know how harmful it can be.
I think we always have to be careful with our children but need to avoid being over anxious and there is far more chance that a child of a lupus parent won't have lupus than he/she will.
Katharine