Friend's period

So my friend was over and she got her period, thankfully she had a pad on because she was expecting it. So I gave her a pad and some Midol. She threw away the pad she was wearing in my bathroom, and now it's stinking up my entire room and even into the hallways, etc. She has a REALLY heavy flow and had to use those giant maxi pads, so I feel kind of bad for giving her a regular flow one. Anyways, what should I do about the smell? Should I talk to her or something because I'm worried she might have an infection or something. It smells REALLY bad. What should I do? I don't want to embarrass her, but when she's on her period, you can smell it when she is near you. I love her to death, but this is becoming an issue!