right..

[Gnome]

right, first thing is first, im not very knowledgable with sex.

is it a good thing if the girl blushes..?

[drama]

wait.. you mean generally? lol

[Gnome]

no, whilst having sex.

[Soy]

if she's shy, then it sounds realistic to blush

[Wayne]

Are you sure she was going red blushing, or going red because she was getting hot?

[Sentrax]

What Wayne said could be right.
But one thing's for sure, it's not a bad thing if the girl blushes. Quite often the girl is a bit iffy about nakedness, even in the dark. So over time couples get more comfortable with each other and it won't be a factor anymore.
xxx

[Zak]

I just think it's cz she's shy

[jackass]

It happens naturally when people have sexual activity, the girl gets hotter and many other things. :P

[Gnome]

Oh, good, was worried i was doing something wrong. xD

thanks, +rep all round.