Nipple stimulation

My wife loves to have her nipples sucked. I've had her say, please don't stop, even after it seems like I've been sucking them forever. Sometimes if I cum before she does, I suck her nipples while she masturbates -- doesn't take long for her to get off. Her breasts aren't very big -- we've seen porn where a woman can suck her own nipples, more than once, she's said, "I wish I could do that." Oh well.

 

I have a girlfriend she always got horny even when i talked about to suck her nipples. She have a size of 38D