"Well I try not to, though it's not something I can always control. It's a power I'm still working on getting one hundred percent control over," Jean tells him honestly. So basically she's telling him that she at times would be hearing his thoughts.

So maybe he should try to keep his thoughts on the clean side around her. She'd greatly appreciate it.

Her eyebrow arches in amusement. Clearly he hasn't been told of her other power. "Well even if you'd like to stop me, I don't think you'd be able to." Jean smiles. She's not being smug or even arrogant, she's just stating a fact.