Dont you want to be mean?

This is the question i am getting. The answer is no.
The background story:
It starts almost 7 years ago when B and i decide to get married. Our marriage was great in the beginning. We both had wonderful jobs great friends and family. Then we get the news we are expecting we were thrilled but cautious as we had lost our first. Things with Noahs pregnancy went well at first. By the time i was six months i started developing high blood pressure. Then around christmas time I delveloped polyhydraminos which is when you do not get rid of your fluid. It could possibly mean that the babies kidneys are failing. Then i started dialating at around 28 weeks. So on bedrest i went! Noah was born on Feb 23rd he was a premie! an 8lb 8oz premie! He spent time in the NICU and that was so hard to leave with out my child. I do not wish that on my enemy.... Life with Noah was rough he was sucha sick little baby that B and I lost our way. When Noah turned 1 we found uot we were expecting again it was a shock to both of us.. We were using protection. Things were starting to look back on track for us. B hard lost his job found a new one that was great! We were doing well. Noah was still very sick though. Didnt know what was wrong with him though. Wyatt joined our family in nov 05 perfectly health we thought. In april of 06 we found out what was wrong with Noah common variable immune defficiency (CVID). We were crushed he was so very sick. We thought we could survive anything... Noah started treatment and did and still does ok not great but ok... We thought things were ok When Wyatt turned 1 things went down hill fast with him health wise. We had him tested and with in a week of him being 18 months and us finding out we were expecting again (planned) he was diagnosed with the same thing. We were to say the least crushed then we found out it is genetic and i was/am the carier... I was soooo scared that we would be having another boy  and could i handle another one. I cried myself to sleep many nights till we found out we were having a girl. But shortly after Mia was born our marriage was slowly going down hill. I cannot speak for B but my feeling is he became very overwhelmed and just shut down. I on the other hand think i went a little crazy bc i felt so out of control. My kids were so sick our finances sucked! we just drifted apart.... We could barely stand to be in the same room all we did was fight. Then my world came crumbling down... I sat down to return some emails and found one that I almost deleted thinking it was spam... I am sure B wished i would have ;) (yes he and i can laugh now)...... I am sure you can imagine what i found.. B admitted it and we tried hard to make it work but I think our marriage was to far gone to be repaired. Honestly though it was the probably the best thing that happened to both of us. Then after he moved i found out i was expecting baby Lo... We are working to hard to do what is best for the kids. So now back to  the question B has met someone who is very special to him and when he comes to pick up the kids this weekend we are going to have lunch so i can meet her since they will be around her. No i am not going to be mean i see no reason to. Plus i do not want the kids to see that and think its ok to be mean. Because its not.