Valentines... Stupid idea?

I have never been one to dress very sexy. I'm a jeans and t-shirt girl, and my husband has never complained. He likes my style. However, ever since my tummy started growing, I've been lounging around the house in oversized t-shirts and my husband's flannel pj pants, and I feel bad for looking so "frumpy" (for lack of a better term). Soooo... I thought for Valentine's Day, I would try to do something special. My husband has been working his butt off trying to get our house ready to sell. I went to Victoria's Secret and bought this really sexy baby doll nightie (it's also see through). It is very flowy, so it fits perfectly over my belly even though it's not maternity. I thought I'd wear it for him tomorrow. But now I'm getting nervous and feeling dumb! This is so not like me, and I'm wondering if he'll be creeped out that I waited until I was 7 months pregnant to finally wear sexy lingerie. What do you ladies think? Be honest but gentle... Should I wear it tomorrow or wait until after I've had the baby and feel ready to get it on again? It's not maternity and a size small, so I can definitely still wear it post-pregnancy.