I have been dealing with this with my son for a year now (hate to tell you that) He got MC back last spring on his legs and butt. We took him to our Pediatrician and they misdiagnosed the lesions in his armpit and cut them off! Horrible. Then we took him to our Dermatologist who told me it was Molloscum Contagiosum and that it is a virus. I don't know if the freezing works or lasering. We used the "beetle juice" in office treatment that blisters and then falls off. I wish I had better news for you, but ours is still not gone (a FULL YEAR LATER) but SO much better. I think I see the light at the end of the tunnel, but it is a virus, tell your ex to do some reading/google it and not be so quick to blame! It does not just go away in a few weeks and can pop up in a totally different location. Be sure not to share bath/towels with your little ones. I don't know how, but my daughter still has not gotten it from my son. My son was 5 when this started, now he is 6. Daughter 3, going to be 4 if that helps. Also, this is VERY common...after my son got it (I had never heard of it and was SO upset) I talked to other moms and they seemed to all have had it. Just know the virus is in their system, it does not go away over night. Again, read up on it. Go see a Dermatologist, that is their specialty and they can go over options with you. Best of luck, write if you need a sounding board. You are definitely not alone.
C. in ALpharetta