Wouldn't it be weird...

[AlexOC]

but the main point is, your sister gave birth to you then had a sex change

yup thats how it would work.

[nat965]

It would be weird
i nearly had that case, an uncle of mine is the same age as me! -facepalm-

[TheEclipse]

I know of a few people who are in that situation. Their grandparents had their kids very spaced out, and their parents had kids young.

[Stryderman]

I dont think its weird at all tbh