A simple nudge is an assault. Sexual assault is a separate crime, as is sexual assault with a weapon, sexual assault facilitated by threatening a third party, and sexual assault which causes bodily harm. The Criminal Code also covers, and more severely punishes, aggravated sexual assault which, as above, includes situations where a wound or disfigurement results from the assault or the life of the victim was endangered. You don't have to wait until you are assaulted to avail yourself of the provisions of the Criminal Code. It is a crime in and of itself to refuse to sign a peace bond ordered by the court, or to disobey an existing bond.
Some provinces have unique laws to deal with family violence.
For example, Manitoba has a special court set up to deal with family violence. Saskatchewan has new legislation which enhances the powers of justices of the peace to judicially intervene instantly in family violence cases. The Divorce Act allows for divorce on the grounds of mental or physical cruelty, although such conduct will have no bearing on the amount of support that a victim can claim and it will only affect custody or visitation rights if it can be shown to affect the ability to parent. Most provinces have special legislation that allows the custodial parent and children to continue possession of the family home no matter who owns it. In Ontario, incidence of violence is a factor in deciding these applications in favour of the victim-parent.