My male Maltese peeing where he sleeps/lays.

My Maltese is going to the bathroom where he sleeps. It may be on the pillow, bed, or sofa but he peas and poops where he lays. We also have a female maltese we purchased about 2 months after the male. She uses the peapads except when she feels neglected. We do not know why he does this. We thought maybe the female is being dominant, or she will not let him go to the bathroom in peace. We really do not know what to do. We are getting tired of picking up poop and/orpea every day. We do not know how to resolve this problem. The only thing we know is that he gets excited easy and cannot control his blatter at times. If anyone can help with this we would appreciate the information to solve this problem.