i said yes to the dress, but

Ummm first of all you look amazing!

I don't think it looks sleezy but you could always ask the seamstress if any changes could be made to make it less deep (maybe bring the sheer part up a bit??)

You have time to make adjustments

Personally, I think it's a lot of exposed chest, but if you're comfortable with it, that's your choice. In the photo, are you wearing your dress or a sample? If it's a sample, and they ordered your dress based on measurements, your dress may cover a bit more when it's in your correct size. In addition to having your alterations person perhaps add some additional fabric to the center front to give you a bit more coverage, it looks to me like the bodice is a little low on you. If the straps are shortened in the front, I think that would lift the whole top half of the dress up a little on your frame and it will likely fit better/cover a little more. Good luck!

Some of your more conservative family members might gasp over it, but the dress looks absolutely amazing on you. I didn't really notice the bustiness of it until you mentioned it. You can always try talking o your seamstress about your options if it's an uncomfortable amount for you. Either way, you're gonna rock it!