Need advice on a potential DRF

So like the title says I need help to figure this out. I work in a office and sometimes I’m left along with a coworker (36F) and we always talk she always laughs at my dumb jokes even during work hours(with everyone here) but we always talk and she’s super nice. I’ve caught her looking at my bulge multiple times. On more than one occasion our hands linger when we touch when we pass things to each other. I’ve tried to brush against her with my bulge but she’s very petite so it’s hard to get a good position/ good timing to make it happen. But after hours she’ll just stare at my bulge and I let her and move and let her just follow it with those sweet eyes of hers. But I know it’s not definitive when women do that. So I want to test the waters out to see if she’s actually down or if she would be looking for more? She’s single doesn’t speak about anyone she might be seeing she knows I’m married and she knows and still does all these cute things smiles that linger a little to long and looks that linger a little longer then they should as well as always being closer then we need to be. So I guess help me out here? I haven’t tired anything besides just trying to front the right time to rub against her but like I said it’s not very easy. Ideas and advice is welcomed and encouraged!!