If you owned the house free and clear before the marriage it's probably yours. If you paid mortgage, significant maintenance or improvements while married then it's probably marital property and the value will be divided. Other property and pensions will probably be divided roughly in half, although if there are portions of the pension that were earned prior to marriage you might get those considered as separate property. Assuming that you're retired, I'm not sure what the implications for spousal support would be--she may be able to apply Social Security based on your benefits rather than her own employment history, and if she's a citizen she should be eligible for Medicare in a couple of years.
Probably best to talk to a lawyer who knows Massachusetts law. And if things are amicable right now and the marriage is not unbearable, it might work better (at least for her) to put the divorce on hold until she gets to 65--a lot of issues would go away at that point.